CVE-2021-42292
Estado: AnalizadaAlta (7.8)⚠ Explotación activa
Microsoft Excel Security Feature Bypass Vulnerability
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 43%
- Percentil entre todas las CVEs puntuadas: 99
- 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).
CISA KEV — explotada activamente
- Añadida al catálogo: 17/11/2021
- Plazo de remediación: 1/12/2021
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1203Exploitation for Client Executionexecution75 % - Impacto principal
T1059.005Visual Basicexecution65 % - Impacto secundario
T1005Data from Local Systemcollection50 % - Impacto secundario
T1547.001Registry Run Keys / Startup Folderpersistence · privilege escalation55 %
Requiere interacción del usuario (UI:R) para abrir archivo malicioso en Excel que elude características de seguridad. Permite ejecución de código y acceso a datos locales con privilegios del usuario.
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
Tecnologías afectadas (6)
CWE
- NVD-CWE-Other
Referencias
JSON original (NVD)
Mostrar
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"id": "CVE-2021-42292",
"cveTags": [],
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"tags": [
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{
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{
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