PT-2026-58487 · Microsoft · Windows Server+3

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-50661

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Windows 10 (affected versions not specified) Windows 11 (affected versions not specified) Windows Server (affected versions not specified)

Description A protection mechanism failure in the BitLocker device encryption workflow allows an unauthorized attacker with physical access to a system to bypass security features and access data stored on the system drive, undermining disk encryption guarantees.

Recommendations Deploy the July 2026 security updates for Windows 10. Deploy the July 2026 security updates for Windows 11. Deploy the July 2026 security updates for Windows Server. Verify that BitLocker remains enabled and correctly configured after patching.

Fix

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

CVE-2026-50661

Affected Products

Bitlocker

Windows 10

Windows 11

Windows Server

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-50661 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50661 · Vendor Advisory
• https://twitter.com/ThreatWire_/status/2077090404701257882 · Twitter Post
• https://thecybersecguru.com/news/bitlocker-zero-day-cve-2026-50661 · Reddit Post
• https://twitter.com/The_Cyber_News/status/2077090185356214592 · Twitter Post
• https://twitter.com/The_Cyber_News/status/2077262382267777220 · Twitter Post
• https://i.redd.it/as3cb1d0i8dh1.png · Reddit Post
• https://t.me/EchelonEyes/4759 · Telegram Post
• https://twitter.com/horizon_secured/status/2077104523693244440 · Twitter Post
• https://twitter.com/Action1corp/status/2077117058215711098 · Twitter Post