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PatchSiren cyber security CVE debrief

CVE-2026-45637 Microsoft CVE debrief

CVE-2026-45637 is a use-after-free vulnerability in the Windows DWM Core Library. An authorized attacker can exploit this vulnerability locally to elevate privileges. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity.

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
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Administrators and users of Windows 10, Windows 11, and Windows Server systems should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability exists in the Windows DWM Core Library and is caused by a use-after-free error. This allows an authorized attacker to elevate privileges locally.

Defensive priority

High

Recommended defensive actions

  • Apply patches and updates from Microsoft as soon as possible.
  • Ensure that all Windows systems are up-to-date with the latest security patches.

Evidence notes

The CVE-2026-45637 vulnerability was published on 2026-06-09T17:17:30.440Z and modified on 2026-06-11T18:24:32.250Z. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45637 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45637

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

  • CVE-2026-45637 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45637

    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.