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PatchSiren cyber security CVE debrief

CVE-2026-50405 Microsoft CVE debrief

CVE-2026-50405 is a HIGH severity vulnerability in Windows Filtering Platform (WFP) with a CVSS score of 7.8. The CVE record was published on 2026-07-14T18:17:43.033Z and was last modified on 2026-07-16T05:16:23.457Z. The NVD entry is currently Awaiting Analysis. The vulnerability has insufficient granularity of access control, allowing an authorized attacker to elevate privileges locally.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
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

Security teams should assess the risk of privilege escalation in their Windows environments. Operators and platform administrators should review the vulnerability's impact on their systems and plan for updates or mitigations.

Technical summary

Insufficient granularity of access control in Windows Filtering Platform (WFP) allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS vector of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Affected systems require updates to restrict WFP access control.

Defensive priority

Apply patches or mitigations to restrict WFP access control and monitor for suspicious activity.

Recommended defensive actions

  • Apply vendor patches or updates
  • Restrict access to WFP configuration
  • Monitor for suspicious activity
  • Review compensating controls for exposed systems
  • Check relevant monitoring, detection, and logs for exposed assets

Evidence notes

The CVE record and NVD details indicate a HIGH severity vulnerability. Microsoft has a reference for this vulnerability. The vulnerability affects Windows Filtering Platform (WFP) and allows an authorized attacker to elevate privileges locally. Evidence is limited, and defenders should verify the affected scope and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50405 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50405

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

  • CVE-2026-50405 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50405

    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.