FKIE_CVE-2021-27706

Vulnerability from fkie_nvd - Published: 2021-04-14 15:15 - Updated: 2026-06-17 03:45
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Buffer Overflow in Tenda G1 and G3 routers with firmware version V15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"IPMacBindIndex "request. This occurs because the "formIPMacBindDel" function directly passes the parameter "IPMacBindIndex" to strcpy without limit.
References
cve@mitre.orghttps://hackmd.io/BhzJ4H20TjqKUiBrDOIKawExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackmd.io/BhzJ4H20TjqKUiBrDOIKawExploit, Third Party Advisory
Impacted products
Vendor Product Version
tenda g1_firmware v15.11.0.17\(9502\)_cn
tenda g1 -
tenda g3_firmware v15.11.0.17\(9502\)_cn
tenda g3 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
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              "matchCriteriaId": "98669DBF-D56B-4E2D-9A12-813CEC185170",
              "vulnerable": true
            }
          ],
          "negate": false,
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              "vulnerable": false
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          ],
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      "operator": "AND"
    },
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              "matchCriteriaId": "01254E20-AFFD-4A1A-A956-36BFD85017D4",
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          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Buffer Overflow in Tenda G1 and G3 routers with firmware version V15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/\"IPMacBindIndex \"request. This occurs because the \"formIPMacBindDel\" function directly passes the parameter \"IPMacBindIndex\" to strcpy without limit."
    },
    {
      "lang": "es",
      "value": "Un desbordamiento de b\u00fafer en los enrutadores Tenda G1 y G3 con versi\u00f3n de firmware V15.11.0.17(9502) _CN permite a atacantes remotos ejecutar c\u00f3digo arbitrario por medio de una petici\u00f3n dise\u00f1ada action/\"IPMacBindIndex\".\u0026#xa0;Esto ocurre porque la funci\u00f3n \"formIPMacBindDel\" pasa directamente el par\u00e1metro \"IPMacBindIndex\" a strcpy sin l\u00edmite"
    }
  ],
  "id": "CVE-2021-27706",
  "lastModified": "2026-06-17T03:45:22.067",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-04-14T15:15:14.033",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://hackmd.io/BhzJ4H20TjqKUiBrDOIKaw"
    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://hackmd.io/BhzJ4H20TjqKUiBrDOIKaw"
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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