CVE-2026-20831

HIGH

7.8

Descripcion

Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Detalles CVE

Puntuacion CVSS v3.17.8

SeveridadHIGH

Vector CVSSCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vector de ataqueLOCAL

ComplejidadLOW

Privilegios requeridosLOW

Interaccion usuarioNONE

Publicado1/13/2026

Ultima modificacion1/15/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_11_23h2microsoft:windows_11_24h2microsoft:windows_11_25h2microsoft:windows_server_2008microsoft:windows_server_2012microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_2022_23h2microsoft:windows_server_2025

Debilidades (CWE)

CWE-367

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20831(secure@microsoft.com)

Correlaciones IOC

Sin correlaciones registradas

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