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PatchSiren cyber security CVE debrief

CVE-2026-42914 Microsoft CVE debrief

CVE-2026-42914 is a MEDIUM severity vulnerability in Windows Kerberos, which can cause a Denial of Service (DoS). The vulnerability has a CVSS score of 5.3 and was published on 2026-06-09T17:17:11.593Z. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.3
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 Windows 10, Windows 11, and Windows Server should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by a weakness in the Kerberos protocol, which can be exploited to cause a Denial of Service (DoS). The vulnerability has been assigned a CWE-125 weakness.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply the patch from Microsoft as soon as possible.
  • Review and update Windows 10, Windows 11, and Windows Server systems to ensure they are running with the latest security updates.

Evidence notes

The vulnerability is based on information from the National Vulnerability Database (NVD) and Microsoft's security advisories.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42914 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42914

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

  • CVE-2026-42914 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42914

    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.