CVE-2026-27906

Windows Hello Security Feature Bypass Vulnerability

CVE-2026-27906 is fixed in 14 products on 1 platform, first by KB5082200, released April 14, 2026. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent

CVSS

4.4

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0039

33rd percentile

<p>Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 21H2 for 32-bit Systems		KB5082200	Apr 14, 2026
Windows 10 Version 21H2 for ARM64-based Systems		KB5082200	Apr 14, 2026
Windows 10 Version 21H2 for x64-based Systems		KB5082200	Apr 14, 2026
Windows 10 Version 22H2 for 32-bit Systems		KB5082200	Apr 14, 2026
Windows 10 Version 22H2 for ARM64-based Systems		KB5082200	Apr 14, 2026
Windows 10 Version 22H2 for x64-based Systems		KB5082200	Apr 14, 2026
Windows 11 Version 23H2 for ARM64-based Systems	22631.6936	KB5082052	Apr 14, 2026
Windows 11 Version 23H2 for x64-based Systems	22631.6936	KB5082052	Apr 14, 2026
Windows 11 Version 24H2 for ARM64-based Systems		KB5083769	Apr 14, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5083769	Apr 14, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5083769	Apr 14, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5083769	Apr 14, 2026
Windows 11 Version 26H1 for ARM64-based Systems	28000.1836	KB5083768	Apr 14, 2026
Windows 11 version 26H1 for x64-based Systems	28000.1836	KB5083768	Apr 14, 2026

Details

Published
April 14, 2026
Weakness
Improper Input Validation
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27906

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