CVE-2026-21510
Microsoft · Published February 10, 2026
8.8
CVSS v3.1
HIGHCISA KEV — Federal agencies must patch by deadline
Actively exploited in the wild
Patch availableGet patch
Description
Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
Affected Products
- Windows 10 1607 < 10.0.14393.8868
- Windows 10 1809 < 10.0.17763.8389
- Windows 10 21h2 < 10.0.19044.6937
- Windows 10 22h2 < 10.0.19045.6937
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H