CVE-2026-45657

Estado: AnalizadaCrítica (9.8)—

Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

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: 0.97%
Percentil entre todas las CVEs puntuadas: 61
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access95 %
Impacto principalT1059 Command and Scripting Interpreterexecution90 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation85 %

Vector CVSS AV:N/PR:N/UI:N indica acceso remoto sin privilegios ni interacción; CWE-122/416 (buffer overflow/UAF) en kernel permite ejecución de código remota. Impacto: ejecución de comandos (T1059) y escalada de privilegios a nivel kernel (T1068).

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 Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning

Tecnologías afectadas (6)

Microsoft — Windows 11 23h2 Microsoft — Windows 11 24h2 Microsoft — Windows 11 25h2 Microsoft — Windows 11 26h1 Microsoft — Windows Server 2022 Microsoft — Windows Server 2025

CWE

CWE-122, CWE-416

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45657

JSON original (NVD)

Mostrar

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