CVE-2026-26166 Double free in Windows Shell allows an authorized attacker to elevate privileges locally

Description

Double free in Windows Shell allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product	Affected versions	Fixed in
Windows 11 version 22H3 10.0	10.0.22631.0 → < 10.0.22631.6936	10.0.22631.6936
Windows 11 Version 23H2 10.0	10.0.22631.0 → < 10.0.22631.6936	10.0.22631.6936
Windows 11 Version 24H2 10.0	10.0.26100.0 → < 10.0.26100.8246	10.0.26100.8246
Windows 11 Version 25H2 10.0	10.0.26200.0 → < 10.0.26200.8246	10.0.26200.8246
Windows 11 version 26H1 10.0	10.0.28000.0 → < 10.0.28000.1836	10.0.28000.1836
Windows Server 2022 10.0	10.0.20348.0 → < 10.0.20348.5020	10.0.20348.5020
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0	10.0.25398.0 → < 10.0.25398.2274	10.0.25398.2274
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.32690	10.0.26100.32690
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.32690	10.0.26100.32690

Other CVEs of Windows 11 version 22H3

The 1557 CVEs of Windows 11 version 22H3 →

CVE-2026-41097 Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security… 6.7 Medium CVE-2026-40413 Windows TCP/IP Denial of Service Vulnerability 7.4 High CVE-2026-40403 Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally 8.8 High CVE-2026-40402 Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally 9.3 Critical