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CVE-2021-25436

Estado: ModificadaCrítica (9.8)—

Improper input validation vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows arbitrary code execution via Samsung Accessory Protocol.

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)

Linux — Tizen

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-25436",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "mobile.security@samsung.com",
      "affectedData": [
        {
          "vendor": "Samsung Mobile",
          "product": "Tizen wearable devices",
          "versions": [
            {
              "status": "affected",
              "version": "Tizen 5.5",
              "lessThan": "Firmware update JUL-2021 Release",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-07-08T14:15:08.787",
  "references": [
    {
      "url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=7",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "mobile.security@samsung.com"
    },
    {
      "url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=7",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "mobile.security@samsung.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper input validation vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows arbitrary code execution via Samsung Accessory Protocol."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de comprobación de entrada inapropiada en el servicio FOTA de Tizen anterior a la actualización del firmware JUL-2021 Release, permite una ejecución de código arbitrario por medio del Protocolo de Accesorios de Samsung"
    }
  ],
  "lastModified": "2026-06-17T03:42:04.893",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:tizen:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B8A186D7-A9F7-4D4B-9D4F-F3C239695EE9",
              "versionEndExcluding": "5.5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "mobile.security@samsung.com"
}