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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-45596

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Description

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Microsoft Windows 10 Version 1607

  • 10.0.14393.0 to < 10.0.14393.9234affected

Microsoft Windows 10 Version 1809

  • 10.0.17763.0 to < 10.0.17763.8880affected

Microsoft Windows 10 Version 21H2

  • 10.0.19044.0 to < 10.0.19044.7417affected

Microsoft Windows 10 Version 22H2

  • 10.0.19045.0 to < 10.0.19045.7417affected

Microsoft Windows 11 version 23H2

  • 10.0.22631.0 to < 10.0.22631.7219affected

Microsoft Windows 11 Version 23H2

  • 10.0.22631.0 to < 10.0.22631.7219affected

Microsoft Windows 11 Version 24H2

  • 10.0.26100.0 to < 10.0.26100.8655affected

Microsoft Windows 11 Version 25H2

  • 10.0.26200.0 to < 10.0.26200.8655affected

Microsoft Windows 11 version 26H1

  • 10.0.28000.0 to < 10.0.28000.2269affected

Microsoft Windows Server 2012

  • 6.2.9200.0 to < 6.2.9200.26132affected

Microsoft Windows Server 2012 (Server Core installation)

  • 6.2.9200.0 to < 6.2.9200.26132affected

Microsoft Windows Server 2012 R2

  • 6.3.9600.0 to < 6.3.9600.23228affected

Microsoft Windows Server 2012 R2 (Server Core installation)

  • 6.3.9600.0 to < 6.3.9600.23228affected

Microsoft Windows Server 2016

  • 10.0.14393.0 to < 10.0.14393.9234affected

Microsoft Windows Server 2016 (Server Core installation)

  • 10.0.14393.0 to < 10.0.14393.9234affected

Microsoft Windows Server 2019

  • 10.0.17763.0 to < 10.0.17763.8880affected

Microsoft Windows Server 2019 (Server Core installation)

  • 10.0.17763.0 to < 10.0.17763.8880affected

Microsoft Windows Server 2022

  • 10.0.20348.0 to < 10.0.20348.5256affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.32995affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.32995affected

References