CVE-2026-21510
Windows Shell Security Feature Bypass Vulnerability
Basic Information
- CVE State
- PUBLISHED
- Reserved Date
- December 30, 2025
- Published Date
- February 10, 2026
- Last Updated
- May 11, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H1, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
- Description
- Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
- Tags
- Exploitation
- active
- Technical Impact
- total
- Exploited in the Wild
- Yes (2026-06-01 10:50:47 UTC) Source
cisa
CVSS Scores
CVSS v3.1
8.8 - HIGH
Vector: 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
SSVC Information
Exploit Status
Known Exploited Vulnerability Information
| Source | Added Date |
|---|---|
| CVE | 2026-06-01 10:50:47 UTC |
Timeline
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CVE ID Reserved
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CVE Published to Public
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Added to KEVIntel