CVE-2026-20929

Microsoft · Published January 13, 2026

7.5

CVSS v3.1

HIGH

Patch availableGet patch

Description

Windows HTTP.sys Elevation of Privilege Vulnerability. Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C