CVE-2026-45603

HIGH

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Title source: cna
STIX 2.1

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45603

Scores

CVSS v3 7.0
EPSS 0.0018
EPSS Percentile 7.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-362 CWE-416
Status published
Products (33)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.9234
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8880
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7417
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7417
Microsoft/Windows 11 version 23H2 10.0.22631.0 - 10.0.22631.7219
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8655
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8655
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2269
Microsoft/Windows Server 2012 6.2.9200.0 - 6.2.9200.26132
Microsoft/Windows Server 2012 (Server Core installation) 6.2.9200.0 - 6.2.9200.26132
... and 23 more
Published Jun 09, 2026
Tracked Since Jun 09, 2026