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CVE-2026-49180 Microsoft CVE debrief

CVE-2026-49180 is a MEDIUM severity vulnerability with a CVSS score of 5.5. 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. This vulnerability could potentially lead to local information disclosure. 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.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49180 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49180

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49180 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49180

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.