CVE-2025-27729 Use after free in Windows Shell allows an unauthorized attacker to execute code locally

Description

Use after free in Windows Shell allows an unauthorized attacker to execute code locally.

Affected products and versions

Product	Affected versions	Fixed in
Windows 10 Version 21H2 10.0	10.0.19044.0 → < 10.0.19044.5737	10.0.19044.5737
Windows 11 version 22H2 10.0	10.0.22621.0 → < 10.0.22621.5189	10.0.22621.5189
Windows 10 Version 22H2 10.0	10.0.19045.0 → < 10.0.19045.5737	10.0.19045.5737
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.3775	10.0.26100.3775
Windows 11 version 22H3 10.0	10.0.22631.0 → < 10.0.22631.5189	10.0.22631.5189
Windows 11 Version 23H2 10.0	10.0.22631.0 → < 10.0.22631.5189	10.0.22631.5189
Windows 11 Version 24H2 10.0	10.0.26100.0 → < 10.0.26100.3775	10.0.26100.3775
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.3775	10.0.26100.3775

Other CVEs of Windows 10 Version 21H2

The 4539 CVEs of Windows 10 Version 21H2 →

CVE-2026-108135 Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to… 7.0 High CVE-2026-108136 Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally 7.8 High CVE-2026-108132 Double free in Windows Kerberos allows an authorized attacker to elevate privileges locally 7.0 High CVE-2026-108129 Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network 6.5 Medium