FKIE_CVE-2026-1637

Vulnerability from fkie_nvd - Published: 2026-01-29 23:16 - Updated: 2026-06-17 10:16
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
References
cna@vuldb.comhttps://github.com/LX-LX88/cve/issues/25Broken Link
cna@vuldb.comhttps://vuldb.com/?ctiid.343416Permissions Required, VDB Entry
cna@vuldb.comhttps://vuldb.com/?id.343416Third Party Advisory, VDB Entry
cna@vuldb.comhttps://vuldb.com/?submit.740865Third Party Advisory, VDB Entry
cna@vuldb.comhttps://www.tenda.com.cn/Product
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/LX-LX88/cve/issues/25Broken Link
Impacted products
Vendor Product Version
tenda ac21_firmware 16.03.08.16
tenda ac21 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*"
          ],
          "product": "AC21",
          "vendor": "Tenda",
          "versions": [
            {
              "status": "affected",
              "version": "16.03.08.16"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*",
              "matchCriteriaId": "089AC516-5475-4725-B348-832A00ED0CC3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "05B05222-6E83-487C-A083-CED82D803330",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue identificada en Tenda AC21 16.03.08.16. El elemento afectado es la funci\u00f3n fromAdvSetMacMtuWan del archivo /goform/AdvSetMacMtuWan. La manipulaci\u00f3n conduce a un desbordamiento de b\u00fafer basado en pila. La explotaci\u00f3n remota del ataque es posible. El exploit est\u00e1 disponible p\u00fablicamente y podr\u00eda ser utilizado."
    }
  ],
  "id": "CVE-2026-1637",
  "lastModified": "2026-06-17T10:16:13.980",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 9.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-1637",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-30T14:36:34.085802Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-29T23:16:11.473",
  "references": [
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Broken Link"
      ],
      "url": "https://github.com/LX-LX88/cve/issues/25"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Permissions Required",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?ctiid.343416"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?id.343416"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?submit.740865"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Product"
      ],
      "url": "https://www.tenda.com.cn/"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Broken Link"
      ],
      "url": "https://github.com/LX-LX88/cve/issues/25"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}



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Sightings

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Nomenclature

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