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CVE-2026-50465 Microsoft CVE debrief

CVE-2026-50465 is a HIGH severity vulnerability in Microsoft Windows DNS, allowing an authorized attacker to perform tampering locally with a CVSS score of 7.1. The vulnerability is due to improper access control. Administrators and security teams responsible for Windows DNS servers should assess the vulnerability and apply patches or mitigations as necessary. The CVE record was published on 2026-07-14T18:17:51.850Z and has not been modified since then. Further investigation and verification are necessary to fully understand the vulnerability's impact and scope.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

Administrators and security teams responsible for Windows DNS servers should assess the vulnerability and apply patches or mitigations as necessary. This includes reviewing and restricting access controls for Windows DNS servers, monitoring Windows DNS servers for suspicious activity, and verifying the vulnerability's impact and scope.

Technical summary

CVE-2026-50465 is a HIGH severity vulnerability in Microsoft Windows DNS, allowing an authorized attacker to perform tampering locally with a CVSS score of 7.1. The vulnerability is due to improper access control. This vulnerability affects Windows DNS servers, and administrators should review and restrict access controls for Windows DNS servers.

Defensive priority

Apply patches or mitigations to prevent local tampering by authorized attackers. Review compensating controls for exposed systems while remediation is scheduled and verified.

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to address the vulnerability.
  • Review and restrict access controls for Windows DNS servers.
  • Monitor Windows DNS servers for suspicious activity.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the vulnerability's impact and scope. The source item URL for CVE-2026-50465 and Microsoft security update guide for CVE-2026-50465 may provide additional context.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50465 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50465

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

  • CVE-2026-50465 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50465

    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.