Vulnerability-Lookup

GHSA-456R-R3M7-3F5F

Vulnerability from github – Published: 2026-10-15 18:32 – Updated: 2026-10-15 18:32

Details

A vulnerability was found in Wavlink WN530HG4B M30HG4B_V260724. The impacted element is an unknown function of the file api.cgi. The manipulation results in heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026-09-24-841a51c6d5_tclinux.bin is sufficient to resolve this issue. The affected component should be upgraded. The vendor confirms: "We confirm the finding, and it has already been addressed. In the current firmware the api=info&client=app handler no longer builds a shell command: the login script is now invoked through an argument vector (execvp) instead of system(), and the client address is length-limited and null-checked."

Severity

10.0 (Critical)


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

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

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{
  "affected": [],
  "aliases": [
    "CVE-2026-110958"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-15T16:17:48Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability was found in Wavlink WN530HG4B M30HG4B_V260724. The impacted element is an unknown function of the file api.cgi. The manipulation results in heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026-09-24-841a51c6d5_tclinux.bin is sufficient to resolve this issue. The affected component should be upgraded. The vendor confirms: \"We confirm the finding, and it has already been addressed. In the current firmware the api=info\u0026client=app handler no longer builds a shell command: the login script is now invoked through an argument vector (execvp) instead of system(), and the client address is length-limited and null-checked.\"",
  "id": "GHSA-456r-r3m7-3f5f",
  "modified": "2026-10-15T18:32:37Z",
  "published": "2026-10-15T18:32:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110958"
    },
    {
      "type": "WEB",
      "url": "https://dl.wavlink.com/firmware/RD/WN530BE2_WAVLINK-WO-2026-09-24-841a51c6d5_tclinux.bin"
    },
    {
      "type": "WEB",
      "url": "https://drive.google.com/file/d/12OOh8g9YDCbD-Q4cc52J6TH9KuOoD44A/view?usp=drive_link"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-110958"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/933388"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/420571"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/420571/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-110958 (GCVE-0-2026-110958)

Vulnerability from cvelistv5 – Published: 2026-10-15 15:30 – Updated: 2026-10-15 18:34

Title

Wavlink WN530HG4B api.cgi heap-based overflow

Summary

Severity

10 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

10 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C

10 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-15 18:34 UTC

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB CNA under the mitre root

CNA scorecard B 82/100 over 3817 records in the last 180 days details

References

6 references

URL	Tags
https://vuldb.com/vuln/420571	vdb-entry
https://vuldb.com/vuln/420571/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-110958	third-party-advisory
https://vuldb.com/submit/933388	third-party-advisory
https://drive.google.com/file/d/12OOh8g9YDCbD-Q4c…	exploit
https://dl.wavlink.com/firmware/RD/WN530BE2_WAVLI…	patch

Impacted products

1 product

Vendor	Product	Version
Wavlink	WN530HG4B	Affected: M30HG4B_V260724 Unaffected: 2026-09-24-841a51c6d5_tclinux.bin cpe:2.3:a:wavlink:wn530hg4b::::::::

Credits

aissac (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-110958",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-15T18:34:10.216285Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-15T18:34:20.350Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:wavlink:wn530hg4b:*:*:*:*:*:*:*:*"
          ],
          "product": "WN530HG4B",
          "vendor": "Wavlink",
          "versions": [
            {
              "status": "affected",
              "version": "M30HG4B_V260724"
            },
            {
              "status": "unaffected",
              "version": "2026-09-24-841a51c6d5_tclinux.bin"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "aissac (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in Wavlink WN530HG4B M30HG4B_V260724. The impacted element is an unknown function of the file api.cgi. The manipulation results in heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026-09-24-841a51c6d5_tclinux.bin is sufficient to resolve this issue. The affected component should be upgraded. The vendor confirms: \"We confirm the finding, and it has already been addressed. In the current firmware the api=info\u0026client=app handler no longer builds a shell command: the login script is now invoked through an argument vector (execvp) instead of system(), and the client address is length-limited and null-checked.\""
        }
      ],
      "metrics": [
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            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P",
            "version": "4.0"
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            "version": "3.1"
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            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 10,
            "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C",
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      "problemTypes": [
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        },
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      "references": [
        {
          "name": "VDB-420571 | Wavlink WN530HG4B api.cgi heap-based overflow",
          "tags": [
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          ],
          "url": "https://vuldb.com/vuln/420571"
        },
        {
          "name": "VDB-420571 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/420571/cti"
        },
        {
          "name": "CVE-2026-110958 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-110958"
        },
        {
          "name": "Submit #933388 | Wavlink WN530HG4B M30HG4B_V260724 Heap-based Buffer Overflow",
          "tags": [
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          ],
          "url": "https://vuldb.com/submit/933388"
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        },
        {
          "tags": [
            "patch"
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          "lang": "en",
          "time": "2026-10-15T11:36:12.000Z",
          "value": "VulDB entry last update"
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    "dateReserved": "2026-10-15T09:30:59.165Z",
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    "state": "PUBLISHED"
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}

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.

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GHSA-456R-R3M7-3F5F

CVE-2026-110958 (GCVE-0-2026-110958)

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