CVE-2023-23397

Estado: AnalizadaCrítica (9.8)⚠ Explotación activa

Microsoft Outlook Elevation of Privilege Vulnerability

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 9.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 97%
Percentil entre todas las CVEs puntuadas: 100
Fecha de la puntuación: 2/10/2026

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: 14/3/2023
Plazo de remediación: 4/4/2023
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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1078.003 Local Accountsstealth · persistence · privilege escalation · initial access75 %
Impacto secundarioT1059 Command and Scripting Interpreterexecution65 %
Impacto secundarioT1548.002 Bypass User Account Controlprivilege escalation70 %

Vulnerabilidad crítica en Outlook (AV:N, PR:N, UI:N) permitiendo elevación de privilegios remota sin autenticación. Explota validación deficiente (CWE-20) en aplicación expuesta en red, típico de T1190. Impactos: acceso con privilegios elevados, ejecución de código y potencial comandos.

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

Privileged Account Management Audit Update Software Vulnerability Scanning User Account Management Restrict Web-Based Content

Tecnologías afectadas (4)

Microsoft — 365 Apps Microsoft — Office Microsoft — Office Long Term Servicing Channel Microsoft — Outlook

CWE

CWE-20
CWE-294

Referencias

JSON original (NVD)

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