CVE-2026-34345

7.0 Élevée

Publiée le 12/05/2026 à 20:17 · Modifiée le 17/06/2026 à 12:38 · Modifiée · Source : secure@microsoft.com

Description

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

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Produits concernés

Microsoft Windows 10 Version 1607
Microsoft Windows 10 Version 1809
Microsoft Windows 10 Version 21H2
Microsoft Windows 10 Version 22H2
Microsoft Windows 11 Version 23H2
Microsoft Windows 11 Version 24H2
Microsoft Windows 11 Version 25H2
Microsoft Windows 11 version 26H1
Microsoft Windows Server 2016
Microsoft Windows Server 2016 (Server Core installation)
Microsoft Windows Server 2019
Microsoft Windows Server 2019 (Server Core installation)
Microsoft Windows Server 2022
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
Microsoft Windows Server 2025
Microsoft Windows Server 2025 (Server Core installation)
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
Microsoft windows 11 26h1
Microsoft windows server 2022 23h2

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.0 Élevée	secure@microsoft.com	`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-362
CWE-416

Références

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34345 Vendor Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories