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CVE-2026-45606 Microsoft CVE debrief

CVE-2026-45606 is a medium-severity vulnerability in the Microsoft UxTheme Library (uxtheme.dll). An authorized attacker can exploit this out-of-bounds read vulnerability to deny service locally. The vulnerability has a CVSS score of 5.5 and was published on 2026-06-09.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
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 Microsoft Windows operating systems, particularly those using Windows 10, Windows 11, and Windows Server versions.

Technical summary

The vulnerability is caused by an out-of-bounds read in the Microsoft UxTheme Library (uxtheme.dll). This allows an authorized attacker to deny service locally. The vulnerability is classified under CWE-125.

Defensive priority

Medium

Recommended defensive actions

  • Apply patches from Microsoft as they become available.
  • Refer to https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45606 for vendor advisory and mitigation guidance.

Evidence notes

The CVE record and details are sourced from official databases.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45606 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45606

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

  • CVE-2026-45606 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45606

    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.