Use-after-free in Windows Server - CVE-2026-49169
Published: July 17, 2026
Vulnerability identifier: #VU137929
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-49169
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute code.
The vulnerability exists due to use-after-free in DNS Server when handling network requests. A remote user can send specially crafted requests to execute code.
Affected software
Windows Server
How to mitigate CVE-2026-49169
Install security update from vendor's website.
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2025 10.0.26100.33158