Unrated severityCISA KEVNVD Advisory· Published Feb 10, 2026· Updated Apr 10, 2026
Windows Shell Security Feature Bypass Vulnerability
CVE-2026-21510
Description
Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
Affected products
2110.0.14393.0+ 2 more
- (no CPE)range: 10.0.14393.0
- (no CPE)range: 10.0.19044.0
- (no CPE)range: 10.0.19045.0
- Range: 10.0.17763.0
- Microsoft/Windows 11 version 22H3v5Range: 10.0.22631.0
- Range: 10.0.22631.0
- Range: 10.0.26100.0
- Range: 10.0.26200.0
- Range: 10.0.28000.0
6.2.9200.0+ 1 more
- (no CPE)range: 6.2.9200.0
- (no CPE)range: 6.3.9600.0
- Microsoft/Windows Server 2012 R2 (Server Core installation)v5Range: 6.3.9600.0
- Microsoft/Windows Server 2012 (Server Core installation)v5Range: 6.2.9200.0
- Range: 10.0.14393.0
- Microsoft/Windows Server 2016 (Server Core installation)v5Range: 10.0.14393.0
- Range: 10.0.17763.0
- Microsoft/Windows Server 2019 (Server Core installation)v5Range: 10.0.17763.0
- Range: 10.0.20348.0
- Microsoft/Windows Server 2022, 23H2 Edition (Server Core installation)v5Range: 10.0.25398.0
- Range: 10.0.26100.0
- Microsoft/Windows Server 2025 (Server Core installation)v5Range: 10.0.26100.0
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21510mitrevendor-advisorypatch
News mentions
4- Week in review: High-severity LPE vulnerability in the Linux kernel, cPanel 0-day exploited for monthsHelp Net Security · May 3, 2026
- Microsoft's patch for a 0-day exploited by Russian spies fell short. Another Windows flaw is under attackThe Register Security · Apr 29, 2026
- CISA Adds Actively Exploited ConnectWise and Windows Flaws to KEVThe Hacker News · Apr 29, 2026
- Microsoft Confirms Active Exploitation of Windows Shell CVE-2026-32202The Hacker News · Apr 28, 2026