CVE-2026-50661 with a CVSS score of 6.1 is a security feature bypass vulnerability in the Windows BitLocker device encryption workflow, allowing an unauthorized attacker with hands-on access to a system to circumvent BitLocker and access data stored on the system drive. The affected versions include multiple Windows 10, Windows 11, and Windows Server releases. A successful attacker can bypass the BitLocker Device Encryption feature on the system storage device, effectively nullifying disk encryption guarantees. This means that if an attacker acquires a powered-off or seized Windows endpoint or server protected by BitLocker, they may be able to leverage this flaw to unlock the drive without knowing the BitLocker PIN, password, or recovery key. The issue is rooted in a failure of BitLocker’s protection mechanisms rather than a classic code execution bug, aligning it with a growing class of “security feature bypass” flaws affecting Windows’ native protection stack. Similar recent BitLocker bypasses have abused weaknesses in the Windows Recovery Environment and boot-time trust assumptions, illustrating that physical-access scenarios continue to be a fertile ground for bypassing encryption and secure boot controls. The business impact is significant, particularly for organizations relying on BitLocker to enforce data-at-rest protection, especially for laptops, branch servers, and cloud-adjacent infrastructure.
We recommend you to update Windows BitLocker Security Feature Bypass Vulnerability to given version link: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50661[/subscribe_to_unlock_form]
CVE-2026-50661 with a CVSS score of 6.1 is a security feature bypass vulnerability in the Windows BitLocker device encryption workflow, allowing an unauthorized attacker with hands-on access to a system to circumvent BitLocker and access data stored on the system drive. The affected versions include multiple Windows 10, Windows 11, and Windows Server releases. A successful attacker can bypass the BitLocker Device Encryption feature on the system storage device, effectively nullifying disk encryption guarantees. This means that if an attacker acquires a powered-off or seized Windows endpoint or server protected by BitLocker, they may be able to leverage this flaw to unlock the drive without knowing the BitLocker PIN, password, or recovery key. The issue is rooted in a failure of BitLocker’s protection mechanisms rather than a classic code execution bug, aligning it with a growing class of “security feature bypass” flaws affecting Windows’ native protection stack. Similar recent BitLocker bypasses have abused weaknesses in the Windows Recovery Environment and boot-time trust assumptions, illustrating that physical-access scenarios continue to be a fertile ground for bypassing encryption and secure boot controls. The business impact is significant, particularly for organizations relying on BitLocker to enforce data-at-rest protection, especially for laptops, branch servers, and cloud-adjacent infrastructure.
We recommend you to update Windows BitLocker Security Feature Bypass Vulnerability to given version link: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50661[emaillocker id="1283"]
The following reports contain further technical details:
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