Use-after-free in Microsoft Windows and Windows Server - CVE-2026-69597
Published: September 8, 2026
Vulnerability identifier: #VU147830
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-69597
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to elevate privileges.
The vulnerability exists due to use-after-free in Windows HTTP.sys when handling network requests. A remote user can interact with Windows HTTP.sys over a network to elevate privileges.
User interaction is required, and successful exploitation requires winning a race condition.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-69597
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7582, 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954
Windows Server - update to 2025 10.0.26100.33438
Windows Server - update to 2025 10.0.26100.33438