CVE-2026-49180 Microsoft CVE debrief

Who should care

Administrators and users of Microsoft Windows 10, Windows 11, and Windows Server systems should be aware of this vulnerability and take necessary actions to mitigate it. This includes reviewing and updating access controls for upnp.dll, monitoring system logs for suspicious activity, and considering implementing compensating controls.

Technical summary

The vulnerability is caused by improper link resolution before file access in the Universal Plug and Play (upnp.dll) component. This allows an authorized attacker to disclose information locally. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N. Affected systems include Microsoft Windows 10, Windows 11, and Windows Server.

Defensive priority

Medium priority should be given to patching and mitigating this vulnerability, as it could potentially lead to local information disclosure.

Recommended defensive actions

• Apply the patch provided by Microsoft
• Review and update access controls for upnp.dll
• Monitor system logs for suspicious activity
• Consider implementing compensating controls
• Inventory affected systems and prioritize patching

Evidence notes

The CVE record was published on 2026-07-14T17:16:53.100Z and was last modified on 2026-07-20T13:16:31.947Z. The NVD entry is currently Analyzed. The vulnerability exists in Universal Plug and Play (upnp.dll) and allows an authorized attacker to disclose information locally due to improper link resolution before file access. Evidence is limited to CVE and NVD details.

Official resources