Vulnerability-Lookup

CVE-2026-7273 (GCVE-0-2026-7273)

Vulnerability from cvelistv5 – Published: 2026-06-16 02:20 – Updated: 2026-09-22 03:55

CISA Previdian

Summary

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-17 00:00 UTC

CWE

CWE-121 - Stack-based buffer overflow

Assigner

Zyxel CNA under the mitre root

CNA scorecard C 70/100 over 11 records in the last 180 days details

References

3 references

URL	Tags
https://www.zyxel.com/global/en/support/security-…	vendor-advisory
https://www.greynoise.io/blog/open-season-on-kapi…	third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

10 products

Vendor	Product	Version	CPE status
Zyxel	GS1900-48HPv2 firmware	Affected: <= 2.90(ABTQ.1)C0	guessed
Zyxel	GS1900-8 firmware	Affected: <= 2.90(AAHH.1)C0	guessed
Zyxel	GS1900-8HP firmware	Affected: <= 2.90(AAHI.1)C0	guessed
Zyxel	GS1900-10HP firmware	Affected: <= 2.90(AAZI.1)C0	guessed
Zyxel	GS1900-16 firmware	Affected: <= 2.90(AAHJ.1)C0	guessed
Zyxel	GS1900-24 firmware	Affected: <= 2.90(AAHL.1)C0	guessed
Zyxel	GS1900-24E firmware	Affected: <= 2.90(AAHK.1)C0	guessed
Zyxel	GS1900-24EP firmware	Affected: <= 2.90(ABTO.1)C0	guessed
Zyxel	GS1900-24HPv2 firmware	Affected: <= 2.90(ABTP.1)C0	guessed
Zyxel	GS1900-48 firmware	Affected: <= 2.90(AAHN.1)C0	guessed

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: b540556b-b860-4d08-b2f2-e272c93b34b5

Vulnerability ID: CVE-2026-7273

Status: Confirmed

Status Updated: 2026-09-21 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2026-09-21

Asserted: 2026-09-21

Scope

Notes: Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability | Affected: Zyxel / GS1900 Series Switches | Description: Zyxel GS1900 series switches contain a stack-based buffer overflow vulnerability in the CGI program which could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request. | Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. | Due date: 2026-09-24 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-7273

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-121
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	GS1900 Series Switches
Due Date	2026-09-24
Date Added	2026-09-21
Vendorproject	Zyxel
Vulnerabilityname	Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
Knownransomwarecampaignuse	Unknown

References

CVE-2026-7273

Created: 2026-09-21 20:00 UTC | Updated: 2026-09-21 20:00 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: b546434a-0753-48e2-badc-a226bf896e67

Vulnerability ID: CVE-2026-7273

Status: Confirmed

Status Updated: 2026-09-21 13:20 UTC

Exploited: Yes

Timestamps

First Seen: 2026-09-21

Asserted: 2026-09-21

Scope

Notes: A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a... | Affected: Zyxel / GS1900-48HPv2 firmware, GS1900-8 firmware, GS1900-8HP firmware, GS1900-10HP firmware, GS1900-16 firmware, GS1900-24 firmware, GS1900-24E firmware, GS1900-24EP firmware, GS1900-24HPv2 firmware, GS1900-48 firmware | CVSS: 8.8 (HIGH) | EPSS: 0.00315 | Used in malware: unknown | Listed 6 hours ahead of CISA KEV | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details

Feed	Previdian (previdian.com)
Title	A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a...
Cve Id	CVE-2026-7273
Vendor	Zyxel
Ghsa Id	GHSA-RRV4-8JQ5-8J78
Product	GS1900-48HPv2 firmware, GS1900-8 firmware, GS1900-8HP firmware, GS1900-10HP firmware, GS1900-16 firmware, GS1900-24 firmware, GS1900-24E firmware, GS1900-24EP firmware, GS1900-24HPv2 firmware, GS1900-48 firmware
Added Date	2026-09-21T13:20:00.000Z
Cvss Score	8.8
Epss Score	0.00315
Previous Ids
Cvss Severity	HIGH
Virtual Patch	False
Cvss Estimated	False
Epss Percentile	0.24603
Used In Malware	unknown
Vulnerability Id	CVE-2026-7273
Ahead Of Cisa Kev	`{ "count": 6, "unit": "hour" }`
Not Yet In Cisa Kev	False

References

Created: 2026-09-22 14:00 UTC | Updated: 2026-09-22 14:00 UTC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-7273",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-17T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2026-09-21",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
              },
              "type": "kev"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-22T03:55:39.207Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "third-party-advisory"
            ],
            "url": "https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation"
          },
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-09-21T00:00:00.000Z",
            "value": "CVE-2026-7273 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-48HPv2 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(ABTQ.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-8 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHH.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-8HP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHI.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-10HP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAZI.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-16 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHJ.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHL.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24E firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHK.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24EP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(ABTO.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24HPv2 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(ABTP.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-48 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHN.1)C0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u0026nbsp;2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
            }
          ],
          "value": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u00a02.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "CWE-121 Stack-based buffer overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-16T02:20:29.847Z",
        "orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
        "shortName": "Zyxel"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
    "assignerShortName": "Zyxel",
    "cveId": "CVE-2026-7273",
    "datePublished": "2026-06-16T02:20:29.847Z",
    "dateReserved": "2026-04-28T06:21:36.574Z",
    "dateUpdated": "2026-09-22T03:55:39.207Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-7273",
      "date": "2026-11-10",
      "epss": "0.02734",
      "percentile": "0.86227"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-48HPv2 firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(ABTQ.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-8 firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAHH.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-8HP firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAHI.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-10HP firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAZI.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-16 firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAHJ.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-24 firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAHL.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-24E firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAHK.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-24EP firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(ABTO.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-24HPv2 firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(ABTP.1)C0"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "GS1900-48 firmware",
                "vendor": "Zyxel",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 2.90(AAHN.1)C0"
                  }
                ]
              }
            ],
            "source": "security@zyxel.com.tw"
          }
        ],
        "cisaActionDue": "2026-09-24",
        "cisaExploitAdd": "2026-09-21",
        "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
        "cisaVulnerabilityName": "Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability",
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7C399F4A-32C4-4482-AC09-718473463836",
                    "versionEndExcluding": "2.90\\(aahh.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "51D33F50-B5A4-4AEF-972C-7FF089C21D52",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "428E979B-9FF5-4968-B399-5B8041B9C9C7",
                    "versionEndExcluding": "2.90\\(aahi.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "27602862-EFB7-402B-994E-254A0B210820",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D2189FCE-CD49-4FF0-91AF-18E4032A7A70",
                    "versionEndExcluding": "2.90\\(aazi.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "89201505-07AF-4F9C-9304-46F2707DB9B4",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "1064772E-0A6C-48D0-B75F-F9B649C39CE5",
                    "versionEndExcluding": "2.90\\(aahj.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5078F7A5-D03B-4D3A-9C19-57DFF4D6BF7A",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "282A3334-6A1D-4758-B315-3AD75775A9F1",
                    "versionEndExcluding": "2.90\\(aahl.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F4F55299-70D5-4CE1-A1EC-D79B469B94F7",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3C91378D-4A01-48BD-8EA0-86FA4CA32186",
                    "versionEndExcluding": "2.90\\(aahk.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A6456AD6-8A1D-4D3D-AC1A-ABE442242B1B",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CC8623A8-D581-4DEB-AE4B-4865D8CC21FA",
                    "versionEndExcluding": "2.90\\(abto.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-24ep:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B22AA8B1-11E2-408F-A1F6-0F8AF32AB131",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "916252C6-288F-44E4-A029-0BE1C684D2E3",
                    "versionEndExcluding": "2.90\\(abtp.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-24hpv2:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "512D9A91-8DA7-47F1-AC77-AF743F99BFF3",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "74EEBA8C-D7F1-45BA-B81F-EFF85B69EFCF",
                    "versionEndExcluding": "2.90\\(aahn.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CFB7D4BF-7D17-48D3-990D-4BADAC8BD868",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "127498BB-7415-4AC9-BF12-318A9A11D467",
                    "versionEndExcluding": "2.90\\(abtq.2\\)c0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:zyxel:gs1900-48hpv2:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BC74C679-6D22-47E4-AE8A-2647B1AA4276",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u00a02.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
          },
          {
            "lang": "es",
            "value": "Una vulnerabilidad de desbordamiento de b\u00fafer basado en pila en el programa CGI de las versiones de firmware Zyxel GS1900-48HPv2 hasta la 2.90(ABTQ.1)C0 podr\u00eda permitir a un atacante no autenticado, basado en la LAN, explotar la falla y potencialmente ejecutar comandos del sistema operativo a trav\u00e9s de una solicitud HTTP manipulada."
          }
        ],
        "id": "CVE-2026-7273",
        "lastModified": "2026-10-25T23:10:00.167",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "security@zyxel.com.tw",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-7273",
                "options": [
                  {
                    "exploitation": "active"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-17T00:00:00+00:00",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-06-16T03:16:13.557",
        "references": [
          {
            "source": "security@zyxel.com.tw",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "tags": [
              "Third Party Advisory",
              "US Government Resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "tags": [
              "Exploit",
              "Third Party Advisory"
            ],
            "url": "https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation"
          }
        ],
        "sourceIdentifier": "security@zyxel.com.tw",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-121"
              }
            ],
            "source": "security@zyxel.com.tw",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-7273",
                    "options": [
                      {
                        "Exploitation": "active"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-09-21T19:40:05.862596Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              },
              {
                "other": {
                  "content": {
                    "dateAdded": "2026-09-21",
                    "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
                  },
                  "type": "kev"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-06-16T12:38:21.874Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "third-party-advisory"
                ],
                "url": "https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation"
              },
              {
                "tags": [
                  "government-resource"
                ],
                "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
              }
            ],
            "timeline": [
              {
                "lang": "en",
                "time": "2026-09-21T00:00:00.000Z",
                "value": "CVE-2026-7273 added to CISA KEV"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-48HPv2 firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(ABTQ.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-8 firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAHH.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-8HP firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAHI.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-10HP firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAZI.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-16 firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAHJ.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-24 firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAHL.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-24E firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAHK.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-24EP firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(ABTO.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-24HPv2 firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(ABTP.1)C0"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "GS1900-48 firmware",
              "vendor": "Zyxel",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 2.90(AAHN.1)C0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u0026nbsp;2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
                }
              ],
              "value": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u00a02.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-121",
                  "description": "CWE-121 Stack-based buffer overflow",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-16T02:20:29.847Z",
            "orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
            "shortName": "Zyxel"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "x_generator": {
            "engine": "Vulnogram 1.0.2"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
        "assignerShortName": "Zyxel",
        "cveId": "CVE-2026-7273",
        "datePublished": "2026-06-16T02:20:29.847Z",
        "dateReserved": "2026-04-28T06:21:36.574Z",
        "dateUpdated": "2026-09-22T03:55:39.207Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

BDU:2026-15011 (CVE-2026-7273)

Vulnerability from fstec – Published: 2026-09-22 – Updated: 2026-09-23 – View on bdu.fstec.ru Exploit publicly available Yes Fixed

CISA Previdian

Title

Уязвимость интерфейса CGI микропрограммного обеспечения маршрутизаторов Zyxel серии GS1900, позволяющая нарушителю выполнить произвольный код

Summary

Уязвимость интерфейса CGI микропрограммного обеспечения маршрутизаторов Zyxel серии GS1900 связана с выходом операции за границы буфера в памяти. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, выполнить произвольный код с помощью специально сформированных HTTP-запросов

Severity

8.3 (High) CVSS 2.0


                      
                        AV:A/AC:L/Au:N/C:C/I:C/A:C

8.8 (High) CVSS 3.1


                      
                        CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Yes

Remediation

Software update

CWE

CWE-121 - Переполнение буфера в стеке

Aliases

CVE-2026-7273

References

4 references

URL
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advi…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273
https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-governmen…
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv

Impacted products

10 products from 1 vendor

Vendors

Zyxel Communications Corp.

Products

GS1900-8, GS1900-8HP, GS1900-10HP, GS1900-16, GS1900-24, GS1900-24E, GS1900-24EP, GS1900-24HPv2, GS1900-48, GS1900-48HPv2

Versions

до 2.90(AAHH.1)C0 включительно (GS1900-8), до 2.90(AAHI.1)C0 включительно (GS1900-8HP), до 2.90(AAZI.1)C0 включительно (GS1900-10HP), до 2.90(AAHJ.1)C0 включительно (GS1900-16), до 2.90(AAHL.1)C0 включительно (GS1900-24), до 2.90(AAHK.1)C0 включительно (GS1900-24E), до 2.90(ABTO.1)C включительно (GS1900-24EP), до 2.90(ABTP.1)C0 включительно (GS1900-24HPv2), до 2.90(AAHN.1)C0 включительно (GS1900-48), до 2.90(ABTQ.1)C0 включительно (GS1900-48HPv2)

Product types

Firmware, Network device, Network appliance software

Mitigations

Использование рекомендаций производителя: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026

JSON

To clipboard

{
  "CVSS 2.0": "AV:A/AC:L/Au:N/C:C/I:C/A:C",
  "CVSS 3.0": "AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Zyxel Communications Corp.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u0434\u043e 2.90(AAHH.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-8), \u0434\u043e 2.90(AAHI.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-8HP), \u0434\u043e 2.90(AAZI.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-10HP), \u0434\u043e 2.90(AAHJ.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-16), \u0434\u043e 2.90(AAHL.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-24), \u0434\u043e 2.90(AAHK.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-24E), \u0434\u043e 2.90(ABTO.1)C \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-24EP), \u0434\u043e 2.90(ABTP.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-24HPv2), \u0434\u043e 2.90(AAHN.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-48), \u0434\u043e 2.90(ABTQ.1)C0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (GS1900-48HPv2)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "16.06.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "23.09.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "22.09.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-15011",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-7273",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "GS1900-8, GS1900-8HP, GS1900-10HP, GS1900-16, GS1900-24, GS1900-24E, GS1900-24EP, GS1900-24HPv2, GS1900-48, GS1900-48HPv2",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": null,
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 CGI \u043c\u0438\u043a\u0440\u043e\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u043e\u0432 Zyxel \u0441\u0435\u0440\u0438\u0438 GS1900, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u0441\u0442\u0435\u043a\u0435 (CWE-121)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 CGI \u043c\u0438\u043a\u0440\u043e\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u043e\u0432 Zyxel \u0441\u0435\u0440\u0438\u0438 GS1900 \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u0432\u044b\u0445\u043e\u0434\u043e\u043c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u043f\u0430\u043c\u044f\u0442\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 HTTP-\u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026\nhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273\nhttps://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation\nhttps://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041c\u0438\u043a\u0440\u043e\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0439 \u043a\u043e\u0434, \u0421\u0435\u0442\u0435\u0432\u043e\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e, \u041f\u041e \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-121",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 8,3)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 8,8)"
}

FKIE_CVE-2026-7273

Vulnerability from fkie_nvd - Published: 2026-06-16 03:16 - Updated: 2026-10-25 23:10

CISA Previdian

Severity

8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security@zyxel.com.tw	https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026	Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273	Third Party Advisory, US Government Resource
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation	Exploit, Third Party Advisory

Impacted products

Vendor	Product	Version
zyxel	gs1900-8_firmware	*
zyxel	gs1900-8	-
zyxel	gs1900-8hp_firmware	*
zyxel	gs1900-8hp	-
zyxel	gs1900-10hp_firmware	*
zyxel	gs1900-10hp	-
zyxel	gs1900-16_firmware	*
zyxel	gs1900-16	-
zyxel	gs1900-24_firmware	*
zyxel	gs1900-24	-
zyxel	gs1900-24e_firmware	*
zyxel	gs1900-24e	-
zyxel	gs1900-24ep_firmware	*
zyxel	gs1900-24ep	-
zyxel	gs1900-24hpv2_firmware	*
zyxel	gs1900-24hpv2	-
zyxel	gs1900-48_firmware	*
zyxel	gs1900-48	-
zyxel	gs1900-48hpv2_firmware	*
zyxel	gs1900-48hpv2	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-48HPv2 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(ABTQ.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-8 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHH.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-8HP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHI.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-10HP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAZI.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-16 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHJ.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHL.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24E firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHK.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24EP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(ABTO.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24HPv2 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(ABTP.1)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-48 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.90(AAHN.1)C0"
            }
          ]
        }
      ],
      "source": "security@zyxel.com.tw"
    }
  ],
  "cisaActionDue": "2026-09-24",
  "cisaExploitAdd": "2026-09-21",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7C399F4A-32C4-4482-AC09-718473463836",
              "versionEndExcluding": "2.90\\(aahh.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "51D33F50-B5A4-4AEF-972C-7FF089C21D52",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "428E979B-9FF5-4968-B399-5B8041B9C9C7",
              "versionEndExcluding": "2.90\\(aahi.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "27602862-EFB7-402B-994E-254A0B210820",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D2189FCE-CD49-4FF0-91AF-18E4032A7A70",
              "versionEndExcluding": "2.90\\(aazi.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "89201505-07AF-4F9C-9304-46F2707DB9B4",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1064772E-0A6C-48D0-B75F-F9B649C39CE5",
              "versionEndExcluding": "2.90\\(aahj.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "5078F7A5-D03B-4D3A-9C19-57DFF4D6BF7A",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "282A3334-6A1D-4758-B315-3AD75775A9F1",
              "versionEndExcluding": "2.90\\(aahl.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "F4F55299-70D5-4CE1-A1EC-D79B469B94F7",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3C91378D-4A01-48BD-8EA0-86FA4CA32186",
              "versionEndExcluding": "2.90\\(aahk.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A6456AD6-8A1D-4D3D-AC1A-ABE442242B1B",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CC8623A8-D581-4DEB-AE4B-4865D8CC21FA",
              "versionEndExcluding": "2.90\\(abto.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-24ep:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "B22AA8B1-11E2-408F-A1F6-0F8AF32AB131",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "916252C6-288F-44E4-A029-0BE1C684D2E3",
              "versionEndExcluding": "2.90\\(abtp.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-24hpv2:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "512D9A91-8DA7-47F1-AC77-AF743F99BFF3",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "74EEBA8C-D7F1-45BA-B81F-EFF85B69EFCF",
              "versionEndExcluding": "2.90\\(aahn.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "CFB7D4BF-7D17-48D3-990D-4BADAC8BD868",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "127498BB-7415-4AC9-BF12-318A9A11D467",
              "versionEndExcluding": "2.90\\(abtq.2\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:zyxel:gs1900-48hpv2:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "BC74C679-6D22-47E4-AE8A-2647B1AA4276",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u00a02.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de b\u00fafer basado en pila en el programa CGI de las versiones de firmware Zyxel GS1900-48HPv2 hasta la 2.90(ABTQ.1)C0 podr\u00eda permitir a un atacante no autenticado, basado en la LAN, explotar la falla y potencialmente ejecutar comandos del sistema operativo a trav\u00e9s de una solicitud HTTP manipulada."
    }
  ],
  "id": "CVE-2026-7273",
  "lastModified": "2026-10-25T23:10:00.167",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "security@zyxel.com.tw",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-7273",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-17T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-16T03:16:13.557",
  "references": [
    {
      "source": "security@zyxel.com.tw",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation"
    }
  ],
  "sourceIdentifier": "security@zyxel.com.tw",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "security@zyxel.com.tw",
      "type": "Secondary"
    }
  ]
}

GHSA-RRV4-8JQ5-8J78

Vulnerability from github – Published: 2026-06-16 03:30 – Updated: 2026-09-21 21:31

Details

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-7273"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-16T03:16:13Z",
    "severity": "HIGH"
  },
  "details": "A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through\u00a02.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.",
  "id": "GHSA-rrv4-8jq5-8j78",
  "modified": "2026-09-21T21:31:33Z",
  "published": "2026-06-16T03:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7273"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273"
    },
    {
      "type": "WEB",
      "url": "https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation"
    },
    {
      "type": "WEB",
      "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-7273 (GCVE-0-2026-7273)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: previdian

Details

References

BDU:2026-15011 (CVE-2026-7273)

FKIE_CVE-2026-7273

GHSA-RRV4-8JQ5-8J78

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour