Protection mechanism failure in Microsoft Windows and Windows Server - CVE-2026-50661
Published: July 17, 2026
Vulnerability identifier: #VU138089
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-50661
CWE-ID: CWE-693
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to bypass a security feature.
The vulnerability exists due to protection mechanism failure in Windows BitLocker when accessing the system storage device with physical access. An attacker with physical access can perform a physical attack to bypass a security feature.
Successful exploitation could allow access to encrypted data on the system storage device.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-50661
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7548, 10 22H2 10.0.19045.7548, 10 1607 10.0.14393.9339, 10 1809 10.0.17763.9020, 11 24H2 10.0.26100.8875, 11 25H2 10.0.26200.8875, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158