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PatchSiren cyber security CVE debrief

CVE-2026-45593 Microsoft CVE debrief

CVE-2026-45593 is a HIGH severity vulnerability in the Windows SDK, allowing an authorized attacker to elevate privileges locally. The vulnerability is caused by a use-after-free issue.

Vendor
Microsoft
Product
Windows SDK
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 Microsoft Windows systems, particularly those using Windows 10, Windows 11, and Windows Server.

Technical summary

The vulnerability is a use-after-free issue in the Windows SDK, which allows an authorized attacker to elevate privileges locally. The CVSS score is 7.8, indicating a HIGH severity level.

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible.
  • Review and update Windows systems to ensure they are running with the latest security updates.

Evidence notes

The CVE record and NVD detail pages provide additional information about the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45593 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45593

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

  • CVE-2026-45593 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45593

    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.