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CVE-2021-30762

Estado: AnalizadaAlta (8.8)⚠ Explotación activa

Se abordó un problema de uso de memoria previamente liberada con una administración de memoria mejorada. Este problema se corrigió en iOS versión 12.5.4. El procesamiento de contenido web diseñado maliciosamente puede conllevar a una ejecución de código arbitrario. Apple tiene conocimiento de un informe que indica que este problema puede haber sido explotado activamente

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).

CISA KEV — explotada activamente

🎯 Técnicas ATT&CK

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

Contenido web malicioso requiere interacción (UI:R). CWE-416 (use-after-free) en navegador permite ejecución arbitraria de código. Explotación activa confirmada en ransomware.

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

Restrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or Program

Tecnologías afectadas (1)

Apple — Iphone OS

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-30762",
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          "role": "CISA Coordinator",
          "options": [
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            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-01-29T17:27:21.674927Z"
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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
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        "obtainAllPrivilege": false,
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      }
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    "cvssMetricV31": [
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    },
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        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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        }
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    {
      "type": "Secondary",
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      "description": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.5.4. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.."
    },
    {
      "lang": "es",
      "value": "Se abordó un problema de uso de memoria previamente liberada con una administración de memoria mejorada. Este problema se corrigió en iOS versión 12.5.4. El procesamiento de contenido web diseñado maliciosamente puede conllevar a una ejecución de código arbitrario. Apple tiene conocimiento de un informe que indica que este problema puede haber sido explotado activamente"
    }
  ],
  "lastModified": "2026-06-17T03:50:50.857",
  "cisaActionDue": "2021-11-17",
  "cisaExploitAdd": "2021-11-03",
  "configurations": [
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          "cpeMatch": [
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            }
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          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "product-security@apple.com",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Apple iOS WebKit Use-After-Free Vulnerability"
}