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CVE-2021-20636

Estado: ModificadaMedia (6.5)—

Una vulnerabilidad de tipo cross-site request forgery (CSRF) en LOGITEC LAN-W300N/PR5B, permite a atacantes remotos secuestrar la autenticación de los administradores por medio de una URL especialmente diseñada. Como resultado, se pueden realizar operaciones no deseadas en el dispositivo, como cambios en la configuración del dispositivo

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 (1)

Logitech — Lan-w300n/pr5b Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-20636",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "LOGITEC CORPORATION",
          "product": "LAN-W300N/PR5B",
          "versions": [
            {
              "status": "affected",
              "version": "LAN-W300N/PR5B"
            }
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        }
      ]
    }
  ],
  "published": "2021-02-12T07:15:14.543",
  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN96783542/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://www.elecom.co.jp/news/security/20210126-01/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://jvn.jp/en/jp/JVN96783542/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.elecom.co.jp/news/security/20210126-01/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cross-site request forgery (CSRF) vulnerability in LOGITEC LAN-W300N/PR5B allows remote attackers to hijack the authentication of administrators via a specially crafted URL. As a result, unintended operations to the device such as changes of the device settings may be conducted."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de tipo cross-site request forgery (CSRF) en LOGITEC LAN-W300N/PR5B, permite a atacantes remotos secuestrar la autenticación de los administradores por medio de una URL especialmente diseñada. Como resultado, se pueden realizar operaciones no deseadas en el dispositivo, como cambios en la configuración del dispositivo"
    }
  ],
  "lastModified": "2026-06-17T03:34:09.740",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "8390BE37-91F5-4B1B-B121-BF6147A79836"
            }
          ],
          "operator": "OR"
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  "sourceIdentifier": "vultures@jpcert.or.jp"
}