Link following in Windows and Windows Server - CVE-2026-49180
Published: July 17, 2026
Vulnerability identifier: #VU137963
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-49180
CWE-ID: CWE-59
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 disclose sensitive information.
The vulnerability exists due to improper link resolution before file access ('link following') in Universal Plug and Play (upnp.dll) when accessing files. A local user can leverage a crafted link to disclose sensitive information.
The disclosed information is limited to file content.
How to mitigate CVE-2026-49180
Install security update from vendor's website.