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CVE-2026-58634Important

Desktop Window Manager Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity
Important
CVSS base score
7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Elevation of Privilege
EPSS, next 30 days
0.3%Higher than 24.1% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability
Exploitation Less Likely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Desktop Window Manager
Weakness
CWE-416: Use After Free
Issued by
Microsoft
Published
14 Jul 2026 · July 2026
Last revised
14 Jul 2026

Updates that fix it

1 KB
KBTypeRestartApplies toOther CVEs
KB5101649 Security Update Required Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems All CVEs in KB5101649

Affected products

Windows
2 affected products
  • Windows 11 Version 26H1 for ARM64-based Systems
  • Windows 11 version 26H1 for x64-based Systems
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