HIGHCVE-2026-20810Published Modified CNA microsoft
CVE-2026-20810: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Free of memory not on the heap in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Metrics
- CVSS v3.1
- 7.8
- Severity
- HIGH
- Fixed in
- 10.0.17763.8276
- Affected Products
- 5
Fix available
10.0.17763.827610.0.19044.680910.0.19045.6809
Affected packages
- Microsoft / Windows 10 Version 1809< 10.0.17763.8276 (from 10.0.17763.0)
- Microsoft / Windows 10 Version 21H2< 10.0.19044.6809 (from 10.0.19044.0)
- Microsoft / Windows 10 Version 22H2< 10.0.19045.6809 (from 10.0.19045.0)
- Microsoft / Windows Server 2019< 10.0.17763.8276 (from 10.0.17763.0)
- Microsoft / Windows Server 2019 (Server Core installation)< 10.0.17763.8276 (from 10.0.17763.0)
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C