CVE-2026-21221

Estado: AnalizadaAlta (7)—

Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.23%
Percentil entre todas las CVEs puntuadas: 13
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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation95 %
Impacto secundarioT1059 Command and Scripting Interpreterexecution75 %

AV:L sin UI:N con PR:L indica escalada local. Race condition en servicio de sistema permite elevar a SYSTEM/administrador. Acceso local + mejora de privilegios = T1068; ejecución de comandos como impacto secundario tras escalada.

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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (3)

Microsoft — Windows 11 24h2 Microsoft — Windows 11 25h2 Microsoft — Windows Server 2025

CWE

CWE-362, CWE-416

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21221

JSON original (NVD)

Mostrar

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    },
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