CVE-2026-45585

MEDIUM CVSS 6.8 View on NVD ↗

Description

Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as "YellowKey". The proof of concept for this vulnerability has been made public violating coordinated vulnerability best practices. We are issuing this CVE to provide mitigation guidance that can be implemented to protect against this vulnerability until the security update is made available.

CVSS Vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products

microsoft/windows_11_24h2 microsoft/windows_11_25h2 microsoft/windows_11_26h1 microsoft/windows_server_2025

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45585
https://github.com/Nightmare-Eclipse/YellowKey

Published: May 20, 2026 00:16 UTC Modified: May 20, 2026 16:42 UTC