Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.
Details
What kind of security feature could be bypassed by successfully exploiting this vulnerability?
An attacker who successfully exploited this vulnerability could bypass Secure Boot.
Security updates
10.0.17763.8644 — https://support.microsoft.com/help/5082123
10.0.25398.2274 — https://support.microsoft.com/help/5082060
10.0.14393.9060 — https://support.microsoft.com/help/5082198
10.0.20348.5020 — https://support.microsoft.com/help/5082142
6.2.9200.26026 — https://support.microsoft.com/help/5082127
6.3.9600.23132 — https://support.microsoft.com/help/5082126
Vulnerabilities 1
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High 7.7
Windows BitLocker Security Feature Bypass Vulnerability
Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.
Revision history
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#1
Information published.
References
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CVE-2026-27913 Windows BitLocker Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27913
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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