CVE-2026-27906

Windows Hello Security Feature Bypass Vulnerability

State: Published
Severity: 4.4 Medium
Published: Apr 14, 2026
Updated: Oct 15, 2026
Reserved: Feb 24, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	4.4 Medium	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.7184Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.7184Affected
Windows 11 version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.6936Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.6936Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.8246Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.8246Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.1836Affected

References

Windows Hello Security Feature Bypass Vulnerabilityvendor-advisorypatch

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