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PatchSiren cyber security CVE debrief

CVE-2026-96930 Microsoft CVE debrief

A Windows Universal Disk Format File System Driver (UDFS) Information Disclosure Vulnerability exists, allowing an authorized attacker to disclose information locally due to an out-of-bounds read issue. This vulnerability impacts Windows systems, where an attacker with local access could exploit it to gain unauthorized information. The vulnerability is addressed through patches provided by Microsoft for affected Windows versions. Windows administrators should prioritize patching and verifying system configurations to secure against potential exploitation.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-14
Advisory published
2026-10-13
Advisory updated
2026-10-14

Who should care

Windows administrators and security teams responsible for patching and securing Windows systems should be aware of this vulnerability. They should assess exposure, apply patches from Microsoft for affected Windows versions, and verify system configurations to ensure UDFS is properly secured. This includes reviewing system logs for potential exploitation attempts and ensuring that compensating controls are in place if

Why it matters

CVE-2026-96930 is a medium-severity vulnerability in Windows UDFS that allows local information disclosure. Windows administrators should assess exposure, apply patches, and verify system configurations to secure against potential exploitation.

  • Local information disclosure possible for authorized attackers
  • Patching required to prevent potential exploitation
  • Verify UDFS configurations to ensure proper security

Technical summary

The Windows Universal Disk Format File System Driver (UDFS) has an out-of-bounds read vulnerability, allowing authorized attackers to disclose information locally. This issue arises from improper handling of file system operations, enabling attackers with local access to gain unauthorized information. Microsoft has released patches for affected Windows versions to address this vulnerability.

Defensive priority

Medium priority for Windows administrators to assess exposure and apply patches

Recommended defensive actions

  • Assess exposure of Windows systems to this vulnerability
  • Apply patches from Microsoft for affected Windows versions
  • Verify system configurations to ensure UDFS is properly secured
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft has released a patch for this issue. The vulnerability is confirmed to affect Windows systems, with an out-of-bounds read issue in the UDFS. Evidence is based on official CVE and NVD records, as well as Microsoft's security update guide. The vulnerability allows local information disclosure and has been addressed through patches.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-96930 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-96930

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

  • CVE-2026-96930 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-96930

    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.