Double free in Microsoft Windows and Windows Server - CVE-2026-96115
Published: November 11, 2026
Vulnerability identifier: #VU165742
CSH Severity: Medium
CVSS v4: 8.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-96115
CWE-ID: CWE-415
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user on the local network to escalate privileges to SYSTEM.
The vulnerability exists due to a double free in Windows DHCP Client when handling network input. A remote user on the local network can trigger repeated freeing of the same memory allocation to corrupt memory and gain SYSTEM privileges.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-96115
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501
Windows Server - addressed in versions 2025 10.0.26100.33730, 2025 10.0.26100.33822
Windows Server - addressed in versions 2025 10.0.26100.33730, 2025 10.0.26100.33822