Vulnerability-Lookup

GHSA-GF7H-GJP8-R79H

Vulnerability from github – Published: 2026-03-23 12:30 – Updated: 2026-03-23 12:30

Details

An unauthenticated credential disclosure vulnerability in the /goform/ate endpoint of Nexxt Solutions Nebula 300+ firmware through Nebula300+_v12.01.01.37 allows an adjacent attacker to obtain the administrator password in Base64-encoded form via a crafted HTTP request. The recovered credential can be used to authenticate to the device and facilitates further compromise when combined with other weaknesses present in the firmware.

Severity ?

6.5 (Medium)


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

7.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-31846"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-23T12:16:07Z",
    "severity": "HIGH"
  },
  "details": "An unauthenticated credential disclosure vulnerability in the /goform/ate endpoint of Nexxt Solutions Nebula 300+ firmware through Nebula300+_v12.01.01.37 allows an adjacent attacker to obtain the administrator password in Base64-encoded form via a crafted HTTP request. The recovered credential can be used to authenticate to the device and facilitates further compromise when combined with other weaknesses present in the firmware.",
  "id": "GHSA-gf7h-gjp8-r79h",
  "modified": "2026-03-23T12:30:30Z",
  "published": "2026-03-23T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31846"
    },
    {
      "type": "WEB",
      "url": "https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip"
    },
    {
      "type": "WEB",
      "url": "https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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-2026-31846 (GCVE-0-2026-31846)

Vulnerability from cvelistv5 – Published: 2026-03-23 12:00 – Updated: 2026-03-26 10:44

Title

Unauthenticated Credential Disclosure via /goform/ate in Nexxt Nebula 300+

Summary

Missing authentication in the /goform/ate endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. The endpoint returns a raw response containing parameters such as Login_PW, which is Base64-encoded. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device.

Severity ?

7.1 (High)


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

6.5 (Medium)


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

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

TuranSec

References

URL

Tags

	https://www.nexxtsolutions.com/connectivity/inter…	product
	https://nexxt-connectivity-frontend.s3.amazonaws.…	product

Impacted products

	Vendor	Product	Version
	Nexxt Solutions	Nebula 300+ / Tenda F3 V2.0 Firmware	Affected: <= 12.01.01.37

Credits

Angel Barre (call4pwn)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-31846",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-23T15:07:13.355307Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-23T15:52:26.640Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "Nebula 300+ / Tenda F3 V2.0 Firmware",
          "vendor": "Nexxt Solutions",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 12.01.01.37"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Angel Barre (call4pwn)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\nMissing authentication in the \u003ccode\u003e/goform/ate\u003c/code\u003e endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. The endpoint returns a raw response containing parameters such as \u003ccode\u003eLogin_PW\u003c/code\u003e, which is Base64-encoded. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device.\n\n\u003c/p\u003e"
            }
          ],
          "value": "Missing authentication in the /goform/ate endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. The endpoint returns a raw response containing parameters such as Login_PW, which is Base64-encoded. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Unauthenticated attackers can retrieve administrative credentials, leading to full compromise when combined with other vulnerabilities."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV2_0": {
            "accessComplexity": "LOW",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "NONE",
            "vectorString": "AV:A/AC:L/Au:N/C:C/I:N/A:N",
            "version": "2.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-26T10:44:33.160Z",
        "orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
        "shortName": "TuranSec"
      },
      "references": [
        {
          "tags": [
            "product"
          ],
          "url": "https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Unauthenticated Credential Disclosure via /goform/ate in Nexxt Nebula 300+",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
    "assignerShortName": "TuranSec",
    "cveId": "CVE-2026-31846",
    "datePublished": "2026-03-23T12:00:42.158Z",
    "dateReserved": "2026-03-09T18:20:23.399Z",
    "dateUpdated": "2026-03-26T10:44:33.160Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-GF7H-GJP8-R79H

CVE-2026-31846 (GCVE-0-2026-31846)

Tags

Sightings

Nomenclature