Use-after-free in Windows Server - CVE-2026-119869
Published: November 11, 2026
Vulnerability identifier: #VU165302
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119869
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to escalate privileges on the affected system.
The vulnerability exists due to use-after-free in Windows Failover Cluster when previously freed memory is accessed. A local privileged user can exploit this invalid memory access locally to escalate privileges.
Affected software
Windows Server
How to mitigate CVE-2026-119869
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