CVE-2026-66804

Microsoft · Published August 11, 2026

7.8

CVSS v3.1

HIGH

Patch availableGet patch

Description

Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability. Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.

Affected Products

Windows 10 Version 22H2 for x64-based Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 11 Version 25H2 for ARM64-based Systems

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