MicrosoftCVE-2026-58634

Microsoft Windows 11 version 26H1: use after free

High7.8CVE-2026-58634 · Published Jul 14, 2026 · updated Jul 15, 2026

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

Microsoft advisory

Affected versions

Package	Affected	Fixed in
Windows 11 version 26H1 Product	>= 10.0.28000.0, < 10.0.28000.2525	10.0.28000.2525

Details and references

CVSS 3.1: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-416

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