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CVE-2021-38646

Estado: AnalizadaAlta (7.8)⚠ Explotación activa

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

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.

Vector AV:L/PR:N/UI:R sugiere escalada local con interacción del usuario. Motor ACE de Office permite RCE (T1059), potencial persistencia (T1547.001) y manipulación de datos (T1565.001). Uso activo en ransomware confirma impactos destructivos.

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 (4)

Microsoft — 365 AppsMicrosoft — OfficeMicrosoft — Office 2016Microsoft — Office 2019

CWE

Referencias

JSON original (NVD)

Mostrar
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  "published": "2021-09-15T12:15:15.033",
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      "source": "secure@microsoft.com"
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      "lang": "en",
      "value": "Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una Vulnerabilidad de Ejecución de Código Remota en Microsoft Office Access Connectivity Engine"
    }
  ],
  "lastModified": "2026-08-10T19:59:12.030",
  "cisaActionDue": "2022-04-18",
  "cisaExploitAdd": "2022-03-28",
  "configurations": [
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}