PatchSiren cyber security CVE debrief

CVE-2026-42907 Microsoft CVE debrief

CVE-2026-42907 is a MEDIUM severity vulnerability with a CVSS score of 6.5. It was published on 2026-06-09T17:17:10.450Z and modified on 2026-06-11T19:23:50.633Z. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server.

Vendor: Microsoft
Product: Windows 10 Version 1809
CVSS: MEDIUM 6.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-09
Original CVE updated: 2026-07-09
Advisory published: 2026-06-09
Advisory updated: 2026-07-09

Who should care

Administrators and users of affected Windows versions should apply patches to mitigate the vulnerability.

Technical summary

The vulnerability allows an authorized attacker to disclose information locally through Windows Shell.

Defensive priority

Apply patches from Microsoft as soon as possible.

Recommended defensive actions

Apply patches from Microsoft as soon as possible. Refer to resourceLinkAnnotations with id 'ref-4' for more information.

Evidence notes

The vulnerability has been analyzed and verified by official sources.

Sources and references

Verified primary and authoritative sources

CVE-2026-42907 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-42907

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-42907 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42907

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42907

[email protected] - Vendor Advisory

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.