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MEDIUM · 4.4

CVE-2026-27906

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

Vulnerability Description

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

CVSS Score

4.4

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftWindows 10 21H2< 10.0.19044.7184
MicrosoftWindows 10 22H2< 10.0.19045.7184
MicrosoftWindows 11 23H2< 10.0.22631.6936
MicrosoftWindows 11 24H2< 10.0.26100.8246
MicrosoftWindows 11 25H2< 10.0.26200.8246
MicrosoftWindows 11 26H1< 10.0.28000.1836

Related Weaknesses (CWE)

CWE-20

References

FAQ

What is CVE-2026-27906?

CVE-2026-27906 is a vulnerability with a CVSS score of 4.4 (MEDIUM). Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.

How severe is CVE-2026-27906?

CVE-2026-27906 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-27906?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 21H2, Microsoft Windows 10 22H2, Microsoft Windows 11 23H2, Microsoft Windows 11 24H2, Microsoft Windows 11 25H2.