Use-after-free in Windows Server - CVE-2026-96017
Published: November 11, 2026
Vulnerability identifier: #VU165672
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-96017
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to cause a denial of service.
The vulnerability exists due to use-after-free in the Windows Server DNS Server role when handling network requests. A remote privileged user can send specially crafted network requests to trigger access to freed memory and cause a denial of service.
Affected software
Windows Server
How to mitigate CVE-2026-96017
Install security update from vendor's website.
Windows Server - addressed in versions 2016 10.0.14393.9688, 2019 10.0.17763.9487, 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822