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CVE-2026-27919 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-14T16:57:13.307Z and has not been modified since then. The NVD entry is currently High. This vulnerability, CVE-2026-27919, is a High-severity elevation of privilege issue in Windows UPnP Device Host. It allows an authorized attacker to elevate privileges locally through an untrusted pointer dereference. Defenders should verify exposure and apply patches, especially for Windows 10, Windows 11, and Windows Server environments. The vulnerability has a CVSS score of 7.8, emphasizing the need for prompt verification and patching to prevent local privilege escalation.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-14
Original CVE updated
2026-10-15
Advisory published
2026-04-14
Advisory updated
2026-10-15

Who should care

Defenders responsible for Windows systems, particularly those using UPnP Device Host, should assess exposure and apply patches. This includes administrators of Windows 10, Windows 11, and Windows Server environments.

Why it matters

CVE-2026-27919 is a High-severity elevation of privilege vulnerability in Windows UPnP Device Host that requires verification and patching to prevent local privilege escalation.

  • Verification of exposure and patching are required to prevent local privilege escalation.
  • Defenders should review and update configurations for UPnP Device Host.
  • Monitoring for potential exploitation attempts is necessary.

Technical summary

The Windows UPnP Device Host Elevation of Privilege Vulnerability (CVE-2026-27919) is a local privilege escalation vulnerability in the Windows Universal Plug and Play (UPnP) Device Host. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is considered High severity.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Windows UPnP Device Host, especially in local privilege escalation scenarios.

Recommended defensive actions

  • Verify exposure of Windows UPnP Device Host in the environment
  • Apply patches provided by Microsoft for affected Windows versions
  • Monitor for potential local privilege escalation attempts
  • Review and update defensive configurations for UPnP Device Host

Evidence notes

The CVE record and NVD entry provide details on the Windows UPnP Device Host Elevation of Privilege Vulnerability, including affected versions and CVSS scores.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27919 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27919

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

  • CVE-2026-27919 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27919

    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.