« Volver al listado

CVE-2021-20852

Estado: ModificadaMedia (6.8)—

Buffer overflow vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute an arbitrary OS command via unspecified vectors.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Elecom — Wrh-733gbk FirmwareElecom — Wrh-733gwh Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-20852",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.2,
          "accessVector": "ADJACENT_NETWORK",
          "vectorString": "AV:A/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 5.1,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.8,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.9
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "ELECOM CO.,LTD.",
          "product": "ELECOM LAN routers",
          "versions": [
            {
              "status": "affected",
              "version": "WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-01T03:15:06.713",
  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN88993473/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://www.elecom.co.jp/news/security/20211130-01/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://jvn.jp/en/jp/JVN88993473/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.elecom.co.jp/news/security/20211130-01/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Buffer overflow vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute an arbitrary OS command via unspecified vectors."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento del búfer en los routers LAN de ELECOM (firmware WRH-733GBK versiones v1.02.9 y anteriores y firmware WRH-733GWH versiones v1.02.9 y anteriores) permite a un atacante adyacente a la red con privilegios de administrador ejecutar un comando arbitrario del sistema operativo por medio de vectores no especificados"
    }
  ],
  "lastModified": "2026-06-17T03:34:32.550",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:elecom:wrh-733gbk_firmware:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "28989732-6761-4356-A4CF-BE172E72C41B",
              "versionEndIncluding": "1.02.9"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:elecom:wrh-733gbk:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "84FA6C86-7C8A-4CF5-9065-CDECDFF65F7E"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:elecom:wrh-733gwh_firmware:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9AC22BBF-F3CF-4B47-B314-BA3DA9A4663D",
              "versionEndIncluding": "1.02.9"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:elecom:wrh-733gwh:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "08BFC900-6728-4EDB-8CC9-27101DF47FC9"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "vultures@jpcert.or.jp"
}