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FKIE_CVE-2021-4029

Vulnerability from fkie_nvd - Published: 2022-02-24 15:15 - Updated: 2026-06-17 04:18
Severity
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.
References
security@zyxel.com.twhttps://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtmlVendor Advisory
Impacted products
Vendor Product Version
zyxel nbg6816_firmware 1.00\(aawb.10\)c0
zyxel nbg6816 -
zyxel nbg6817_firmware *
zyxel nbg6817 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "ARMOR Z2 (NBG6817) firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "1.00(ABCS.10)C0"
            }
          ]
        },
        {
          "product": "ARMOR Z1 (NBG6816) firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "1.00(AAWB.10)C0"
            }
          ]
        }
      ],
      "source": "security@zyxel.com.tw"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "matchCriteriaId": "51FE7589-8B85-40D9-A361-ECB2DC902D72",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
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              "matchCriteriaId": "DEBACD2B-7C99-437F-B5C7-0EEA387DFE78",
              "vulnerable": false
            }
          ],
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        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
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          "cpeMatch": [
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              "criteria": "cpe:2.3:o:zyxel:nbg6817_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7A4183C2-A488-4A80-AFDD-3CBC90D912D0",
              "versionEndExcluding": "1.00\\(abcs.11\\)c0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de inyecci\u00f3n de comandos en el programa CGI del firmware Zyxel ARMOR Z1/Z2 podr\u00eda permitir a un atacante ejecutar comandos arbitrarios del sistema operativo por medio de una interfaz LAN"
    }
  ],
  "id": "CVE-2021-4029",
  "lastModified": "2026-06-17T04:18:55.180",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "ADJACENT_NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 8.3,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 6.5,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "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"
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        "impactScore": 5.9,
        "source": "security@zyxel.com.tw",
        "type": "Secondary"
      },
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          "attackVector": "ADJACENT_NETWORK",
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          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "impactScore": 5.9,
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        "type": "Primary"
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    ]
  },
  "published": "2022-02-24T15:15:25.150",
  "references": [
    {
      "source": "security@zyxel.com.tw",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"
    }
  ],
  "sourceIdentifier": "security@zyxel.com.tw",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "security@zyxel.com.tw",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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