CVE-2026-45585

Severity CVSS v4.0:

Pending analysis

Type:

CWE-77 Command Injection

Publication date:

20/05/2026

Last modified:

20/05/2026

Description

Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as &quot;YellowKey&quot;. The proof of concept for this vulnerability has been made public violating coordinated vulnerability best practices.<br /> 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.

Impact

Vector 3.x

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Physical
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

6.80

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45585