Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Exploited according to Microsoft — Exploitation Detected. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Security updates
10.0.17763.8389 — https://support.microsoft.com/help/5075904
10.0.20348.4773 — https://support.microsoft.com/help/5075906
10.0.20348.4711 — https://support.microsoft.com/help/5075943
10.0.19044.6937 — https://support.microsoft.com/help/5075912
10.0.26100.32370 — https://support.microsoft.com/help/5075899
10.0.26100.32313 — https://support.microsoft.com/help/5075942
10.0.26200.7840 — https://support.microsoft.com/help/5077181
10.0.26200.7781 — https://support.microsoft.com/help/5077212
10.0.22631.6649 — https://support.microsoft.com/help/5075941
10.0.25398.2149 — https://support.microsoft.com/help/5075897
10.0.14393.8868 — https://support.microsoft.com/help/5075999
10.0.28000.1575 — https://support.microsoft.com/help/5077179
Vulnerabilities 1
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High 7.8CVE-2026-21519 Exploited
Desktop Window Manager Elevation of Privilege Vulnerability
Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
KEV Feb 10, 2026
Revision history
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#1
Information published.
References
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CVE-2026-21519 Desktop Window Manager Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21519
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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