Cyber Resilience

CVE-2026-45585

MediumPublic PoC

Published: 20 May 2026

Published
20 May 2026
Modified
22 May 2026
KEV Added
Patch
CVSS Score v3.1 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0012 31.2th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-45585 is a medium-severity Command Injection (CWE-77) vulnerability in Microsoft Windows 11 24H2. Its CVSS base score is 6.8 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Windows Command Shell (T1059.003); ranked at the 31.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

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guidance that can be implemented to protect against this vulnerability until the security update is made available. Mitigation FAQs Should I leverage the temporary mitigation? Microsoft recommends that you consider implementing these mitigations if you are concerned your devices and data are at risk of being compromised or stolen. For example, if your organization’s employees take their work devices home or on business travel. What impact to service availability/management could be caused by implementing the mitigations? Implementing these mitigations will not impact service availability or management operations. Do customers need to revert the changes made to mitigate the vulnerability once the security update to protect against this vulnerability is available? No. The security update will maintain the mitigation's behavior once the security update is installed. I am using TPM+PIN, am I at risk of this vulnerability being exploited No, if you are using TPM+PIN the vulnerability is not exploitable.

CWE(s)

Related Threats

Threat-Actor AttributionAI

North Korea Hackers Spotted Targeting Job Seekers with macOS Malware
Chinese Hackers Carried Out Country-Level Watering Hole Attack
IndigoZebra (G0136)
IndigoZebra APT Hacking Campaign Targets the Afghan Government

MITRE ATT&CK Enterprise TechniquesAI

T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
Why these techniques?

CWE-77 command injection in Windows security feature bypass directly enables arbitrary command execution via the Windows shell and supports privilege escalation.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

Affected Assets

microsoft
windows 11 24h2
all versions
microsoft
windows 11 25h2
all versions
microsoft
windows 11 26h1
all versions
microsoft
windows server 2025
all versions

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References