Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What kind of security feature could be bypassed by successfully exploiting this vulnerability?
This vulnerability could allow an attacker to bypass the Windows biometric authentication feature. A malicious biometric device could be incorrectly recognized as trusted, allowing an attacker to falsely present biometric data and potentially gain access to the device without the legitimate user's fingerprint or face.
Security updates
10.0.17763.9376 — https://support.microsoft.com/help/5126651
10.0.20348.5761 — https://support.microsoft.com/help/5126655
10.0.19044.7807 — https://support.microsoft.com/help/5126657
10.0.26100.33650 — https://support.microsoft.com/help/5126646
10.0.26200.9711 — https://support.microsoft.com/help/5127648
10.0.22631.7652 — https://support.microsoft.com/help/5126653
10.0.28000.3231 — https://support.microsoft.com/help/5127646
Vulnerabilities 1
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Medium 4.4
Windows Hello Security Feature Bypass Vulnerability
Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.
Revision history
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#3
Updated an acknowledgement. This is an informational change only.
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#2
Updated an acknowledgement. This is an informational change only.
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#1
Information published.
References
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CVE-2026-83926 Windows Hello Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83926
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss