CVE-2026-21510
Windows Shell Security Feature Bypass Vulnerability
In short
A flaw in Windows Shell's protection system allows attackers to bypass security features remotely. This means someone over the network could circumvent built-in Windows security controls without proper authorization.
Technical detail
CWE-693 protection mechanism failure in Windows Shell enables remote bypass of security features through network-accessible vectors. The vulnerability requires network access but no user interaction or elevated privileges as pre-conditions, resulting in security control circumvention with potential for privilege escalation or unauthorized system access.
Summary generated and translated by AI from the official description.
Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 version 22H3Microsoft · Windows 11 Version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2012 R2 (Server Core installation)Microsoft · Windows Server 2012 (Server Core installation)Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 1
githubgithub.com/EpSiLoNPoInTOrI/EpSiLoNPoInTlnk★ 2⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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