CVE-2026-27913

Windows BitLocker Security Feature Bypass Vulnerability

State: Published
Severity: 7.7 High
Published: Apr 14, 2026
Updated: Oct 15, 2026
Reserved: Feb 24, 2026

Description

Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
Windows Server 2012Microsoft	6.2.9200.0 to before 6.2.9200.26026Affected
Windows Server 2012 (Server Core installation)Microsoft	6.2.9200.0 to before 6.2.9200.26026Affected
Windows Server 2012 R2Microsoft	6.3.9600.0 to before 6.3.9600.23132Affected
Windows Server 2012 R2 (Server Core installation)Microsoft	6.3.9600.0 to before 6.3.9600.23132Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.9060Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.9060Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.8644Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.8644Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5020Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.2274Affected

References

Windows BitLocker Security Feature Bypass Vulnerabilityvendor-advisorypatch

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