MSRC-CVE-2026-58634 — Desktop Window Manager Elevation of Privilege Vulnerability

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What privileges could be gained by an attacker who successfully exploited the vulnerability?
A domain user could use this vulnerability to elevate privileges to SYSTEM assigned integrity level.

Security updates
10.0.28000.2525 — https://support.microsoft.com/help/5101649

Vulnerabilities 1

High 7.8

CVE-2026-58634

Desktop Window Manager Elevation of Privilege Vulnerability

Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

Microsoft Windows 11 version 26H1 Windows

Jul 14, 2026

Revision history

2026-07-14 #1
Information published.

References

CVE-2026-58634 Desktop Window Manager Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58634
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss