CVE-2026-45585

medium Microsoft
CVSS v3 Base Score
6.8
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C
EPSS Score
0.1%
Exploitation probability in 30 days
Top 76% most likely to be exploited
Attack Characteristics
Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: May 19, 2026 (51 days ago)
Last Modified: May 21, 2026
Vendor: Microsoft
Source: MITRE

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.

CWE

CWE-77

Affected Products

Microsoft Windows 11 Version 24H2Microsoft Windows 11 Version 25H2Microsoft Windows 11 version 26H1Microsoft Windows Server 2025Microsoft Windows Server 2025 (Server Core installation)

References

🔗 msrc.microsoft.com