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CVE-2026-85825 Microsoft CVE debrief

A use-after-free vulnerability exists in the Windows Universal Disk Format File System Driver (UDFS). An authorized attacker could exploit this vulnerability to elevate privileges locally. This elevation of privilege vulnerability, tracked as CVE-2026-85825, is caused by a use-after-free weakness in the Windows Universal Disk Format File System Driver (UDFS). An attacker with local access and authorization could exploit this vulnerability to gain elevated privileges. System administrators and security teams responsible for Windows systems, especially those exposed to local attacks, should assess their exposure and apply patches. The vulnerability has been documented by the CVE and

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7
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

System administrators and security teams responsible for Windows systems, especially those exposed to local attacks, should assess their exposure and apply patches.

Why it matters

CVE-2026-85825 is a high-severity elevation of privilege vulnerability in the Windows Universal Disk Format File System Driver (UDFS). An authorized attacker could exploit this vulnerability locally to gain elevated privileges. System administrators should prioritize patching affected systems.

  • Local privilege escalation could allow an attacker to gain elevated access.
  • Successful exploitation requires local access and authorization.
  • Patching affected systems is crucial to prevent exploitation.
  • Further verification is needed to determine the full scope of affected systems.

Technical summary

The Windows Universal Disk Format File System Driver (UDFS) is vulnerable to a use-after-free attack, allowing an authorized attacker to elevate privileges locally. The vulnerability has been documented by the CVE Program and NVD. Microsoft has released patches for this vulnerability. System administrators should prioritize patching affected systems, especially those exposed to local attacks. The vulnerability is a high-severity elevation of privilege vulnerability in the Windows Universal Disk Format File System Driver (UDFS).

Defensive priority

Microsoft has released patches for this vulnerability. System administrators should prioritize patching affected systems, especially those exposed to local attacks.

Recommended defensive actions

  • Apply patches from Microsoft for affected Windows versions.
  • Restrict local access to sensitive systems.
  • Monitor system logs for suspicious activity.

Evidence notes

The CVE Program and NVD have documented this vulnerability. Microsoft has provided a patch for affected systems. The vulnerability is a use-after-free issue in the Windows Universal Disk Format File System Driver (UDFS). The CVE record was published on 2026-10-13T19:00:07.229Z and has not been modified since then. Further verification is needed to determine the full scope of affected systems. System administrators should prioritize patching affected systems, especially those exposed to

Sources and references

Verified primary and authoritative sources

  • CVE-2026-85825 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-85825

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

  • CVE-2026-85825 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-85825

    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.