CVE-2026-45603
Windows Ancillary Function Driver for WinSock Elevation of Privilege vulnerability
MSRC advisory June 9, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-45603
- Affected products
- Windows Ancillary Function Driver for WinSock Elevation of Privilege · Microsoft Windows Ancillary Function Driver for WinSock Elevation of Privilege · Microsoft
What happened
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
What it means for your business
Windows Ancillary Function Driver for WinSock Elevation of Privilege vulnerability (CVE-2026-45603) was added to Microsoft’s security update guidance. Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. If you need help checking exposure, call (864) 335-9223.
Sources
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