CVE-2026-45585
Windows "YellowKey" Security Feature Bypass Vulnerability
Publication date: 2026-05-20
Last updated on: 2026-05-20
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-77 | The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-45585 is a security feature bypass vulnerability in Microsoft Windows, publicly known as "YellowKey".
This vulnerability allows an attacker to bypass certain security features in Windows, potentially undermining the system's protections.
A proof of concept for this vulnerability has been made public, which violates coordinated vulnerability disclosure best practices.
Microsoft has issued this CVE to provide mitigation guidance until a security update is available.
How can this vulnerability impact me? :
This vulnerability can have a significant impact as it allows bypassing of security features in Windows.
According to the CVSS v3.1 score, it has a base score of 6.8, indicating a high level of severity.
The impact includes potential compromise of confidentiality, integrity, and availability of affected systems.
What immediate steps should I take to mitigate this vulnerability?
Microsoft has issued mitigation guidance that can be implemented to protect against the YellowKey security feature bypass vulnerability until a security update is available.
Specific mitigation steps or commands are not detailed in the provided resources.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how the YellowKey security feature bypass vulnerability directly affects compliance with common standards and regulations such as GDPR or HIPAA.