CVE-2026-20853

Estado: AnalizadaAlta (7.4)—

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.4

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.32%
Percentil entre todas las CVEs puntuadas: 23
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 %

Vector CVSS AV:L/AC:H/PR:N/UI:N indica acceso local sin interacción del usuario (T1068). CWE-362 (race condition) en WalletService permite escalada de privilegios local confirmada en descripción.

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

Threat Intelligence Program Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (7)

Microsoft — Windows 10 1607 Microsoft — Windows 10 1809 Microsoft — Windows 10 21h2 Microsoft — Windows 10 22h2 Microsoft — Windows 11 23h2 Microsoft — Windows 11 24h2 Microsoft — Windows 11 25h2

CWE

CWE-362

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20853

JSON original (NVD)

Mostrar

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