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PatchSiren cyber security CVE debrief

CVE-2026-69794 Microsoft CVE debrief

A buffer over-read vulnerability in the Windows Encrypting File System (EFS) could allow an authorized local attacker to disclose information. The vulnerability has a CVSS score of 5.5 and is considered medium severity. Microsoft has released a patch for this vulnerability. Windows EFS users and administrators should review and apply the Microsoft patch, ensure proper configuration and monitoring of Windows EFS, and consider additional security measures to protect sensitive data. The CVE record and NVD detail page provide information about the vulnerability, including its description, CVSS score, and affected systems.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-22
Advisory published
2026-09-08
Advisory updated
2026-09-22

Who should care

Windows EFS users and administrators should be aware of this vulnerability and take steps to protect themselves. This includes reviewing and applying the Microsoft patch, ensuring that Windows EFS is properly configured and monitored, and considering additional security measures to protect sensitive data.

Why it matters

CVE-2026-69794 is a medium-severity vulnerability in Windows EFS that could allow local information disclosure. Windows EFS users and administrators should review and apply the Microsoft patch, ensure proper configuration and monitoring of Windows EFS, and consider additional security measures to protect sensitive data.

  • Local information disclosure possible for authorized attackers
  • Patching required to prevent exploitation
  • Configuration and monitoring of Windows EFS recommended
  • Additional security measures may be necessary to protect sensitive data

Technical summary

The CVE-2026-69794 vulnerability is a buffer over-read issue in the Windows Encrypting File System (EFS). An authorized local attacker could exploit this vulnerability to disclose information. The vulnerability has a CVSS score of 5.5 and is considered medium severity. Microsoft has released a patch for this vulnerability, which should be applied as soon as possible.

Defensive priority

Medium priority for Windows EFS users and administrators

Recommended defensive actions

  • Review and apply the Microsoft patch for CVE-2026-69794
  • Ensure that Windows EFS is properly configured and monitored
  • Consider implementing additional security measures to protect sensitive data

Evidence notes

The CVE record and NVD detail page provide information about the vulnerability, including its description, CVSS score, and affected systems. Microsoft has released a vendor advisory and patch for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69794 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69794

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

  • CVE-2026-69794 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69794

    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.