Missing Authentication for Critical Function in Windows and Windows Server - CVE-2026-49174
Published: July 17, 2026
Vulnerability identifier: #VU137931
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-49174
CWE-ID: CWE-306
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a local user to perform tampering.
The vulnerability exists due to improper access control in Windows DNS when invoking a critical function. A local user can invoke the vulnerable function to perform tampering.
How to mitigate CVE-2026-49174
Install security update from vendor's website.