CVE-2021-26280

Estado: AplazadaAlta (7.9)—

Locally installed application can bypass the permission check and perform system operations that require permission.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:H
Puntuación base: 7.9

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.15%
Percentil entre todas las CVEs puntuadas: 4
Fecha de la puntuación: 6/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1203 Exploitation for Client Executionexecution85 %
Impacto principalT1078 Valid Accountsstealth · persistence · privilege escalation · initial access70 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation75 %

AV:L + UI:R indica ejecución en cliente (abrir archivo preparado); bypass de permisos (CWE-306) permite escalada a operaciones de sistema con altos privilegios (C:H, A:H).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Application Isolation and Sandboxing Exploit Protection Update Software Application Developer Guidance Active Directory Configuration User Training

CWE

CWE-306

Referencias

https://www.vivo.com/en/support/security-advisory-detail?id=6

JSON original (NVD)

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{
  "id": "CVE-2021-26280",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-26280",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-12-17T14:37:46.709012Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@vivo.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.9,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.8,
        "exploitabilityScore": 1.5
      }
    ]
  },
  "affected": [
    {
      "source": "security@vivo.com",
      "affectedData": [
        {
          "vendor": "vivo",
          "product": "Permission manager module",
          "versions": [
            {
              "status": "affected",
              "version": "Versions earlier than Android 10"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2024-12-17T07:15:05.343",
  "references": [
    {
      "url": "https://www.vivo.com/en/support/security-advisory-detail?id=6",
      "source": "security@vivo.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@vivo.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Locally installed application can bypass the permission check and perform system operations that require permission."
    },
    {
      "lang": "es",
      "value": "La aplicación instalada localmente puede eludir la verificación de permisos y realizar operaciones del sistema que requieren permiso."
    }
  ],
  "lastModified": "2026-06-17T03:43:03.280",
  "sourceIdentifier": "security@vivo.com"
}