Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker who can run a malicious application locally inside an AppContainer could send specially crafted data to the desktop compositor. Successful exploitation could give the attacker Desktop Window Manager privileges outside that AppContainer. No action by another user is required.
Security updates
10.0.26300.9974 — https://support.microsoft.com/help/5132061
10.0.26300.9911 — https://support.microsoft.com/help/5132043
10.0.20348.5870 — https://support.microsoft.com/help/5131090
10.0.26100.33822 — https://support.microsoft.com/help/5131080
10.0.26100.33730 — https://support.microsoft.com/help/5131077
10.0.22631.7711 — https://support.microsoft.com/help/5131087
10.0.28000.3501 — https://support.microsoft.com/help/5132059
Vulnerabilities 1
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High 8.8
Desktop Window Manager Elevation of Privilege Vulnerability
Stack-based buffer overflow in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-105581 Desktop Window Manager Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105581
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss