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CVE-2026-44802 Microsoft CVE debrief

CVE-2026-44802 is a use-after-free vulnerability in the Windows DWM Core Library. This vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability was published on [cvePublishedAt]2026-06-09T17:17:16.010Z[/cvePublishedAt] and last modified on [cveModifiedAt]2026-06-12T17:05:08.167Z[/cveModifiedAt].

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-12
Advisory published
2026-06-09
Advisory updated
2026-06-12

Who should care

Administrators and users of Windows operating systems should be aware of this vulnerability, especially in environments where local privilege escalation is a concern.

Technical summary

The vulnerability is caused by a use-after-free issue in the Windows DWM Core Library. This type of vulnerability occurs when a program tries to use memory after it has been freed, which can lead to unpredictable behavior, crashes, or, in this case, potential privilege escalation.

Defensive priority

High

Recommended defensive actions

  • Apply patches or updates provided by Microsoft as soon as possible.
  • Ensure that all Windows operating systems and related components are up-to-date.
  • Monitor systems for unusual activity that could indicate exploitation.

Evidence notes

The CVE record and details are sourced from official databases and vendor advisories.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44802 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44802

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

  • CVE-2026-44802 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44802

    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.