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CVE-2026-42970 Microsoft CVE debrief

CVE-2026-42970 is a medium-severity vulnerability in Windows Push Notifications that allows an authorized attacker to disclose information locally. The vulnerability has a CVSS score of 5.5 and is classified as CWE-200. It was published on 2026-06-09T17:17:12.463Z and last modified on 2026-06-11T19:52:51.250Z.

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
2026-07-09
Advisory published
2026-06-09
Advisory updated
2026-07-09

Who should care

This vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. Users of these systems should apply patches or mitigations as soon as possible.

Technical summary

The vulnerability is caused by the use of an uninitialized resource in Windows Push Notifications. An authorized attacker can exploit this vulnerability to disclose information locally.

Defensive priority

Medium

Recommended defensive actions

  • Apply patches or mitigations provided by Microsoft as soon as possible.
  • Ensure that Windows Push Notifications are properly configured and secured.
  • Monitor system logs for potential exploitation attempts.

Evidence notes

The vulnerability is documented in the CVE record and NVD detail pages. Microsoft has provided a vendor advisory for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42970 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42970

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

  • CVE-2026-42970 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42970

    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.