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CVE-2026-69425 Microsoft CVE debrief

CVE-2026-69425 is a medium-severity vulnerability in Windows NTFS that allows an authorized attacker to perform tampering locally due to improper link resolution before file access. The CVE record was published on 2026-09-08T18:19:05.923Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability affects multiple versions of Windows 11, including Windows 11 23H2, 24H2, 25H2, and 26H1. Microsoft has provided a patch advisory for this vulnerability. Defenders should prioritize verifying and applying patches, reviewing and updating inventory, and monitoring local access control and authorization mechanisms to prevent exploitation.

Vendor
Microsoft
Product
Windows 11 version 23H2
CVSS
MEDIUM 4.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-14
Advisory published
2026-09-08
Advisory updated
2026-09-14

Who should care

Defenders and administrators responsible for Windows systems, especially those with local access control and authorization mechanisms, should assess exposure and prioritize patching.

Why it matters

CVE-2026-69425 is a medium-severity vulnerability in Windows NTFS that allows an authorized attacker to perform tampering locally. Defenders should prioritize verifying and applying patches, reviewing and updating inventory, and monitoring local access control and authorization mechanisms.

  • Verify and apply patches to prevent local tampering
  • Review and update inventory of Windows systems to identify potential exposure
  • Monitor for local access control and authorization mechanisms to prevent exploitation

Technical summary

The vulnerability is caused by improper link resolution before file access in Windows NTFS, allowing an authorized attacker to perform tampering locally. The CVSS score is 4.7, and the severity is MEDIUM. The vulnerability affects multiple versions of Windows 11.

Defensive priority

Defenders should prioritize verifying and applying patches for this vulnerability, especially in environments where local access can be controlled.

Recommended defensive actions

  • Verify and apply patches for CVE-2026-69425
  • Review and update inventory of Windows systems to identify potential exposure
  • Monitor for local access control and authorization mechanisms

Evidence notes

The vulnerability is described as improper link resolution before file access, allowing local tampering. Affected versions include Windows 11 23H2, 24H2, 25H2, and 26H1. Microsoft has provided a patch advisory for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69425 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69425

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

  • CVE-2026-69425 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69425

    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.