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PatchSiren cyber security CVE debrief

CVE-2026-85935 Microsoft CVE debrief

A buffer over-read in the Windows USB Driver allows an authorized attacker to disclose information locally. Multiple Windows versions are affected, including Windows 10, Windows 11, and Windows Server. This vulnerability has a medium severity and requires patching to prevent exploitation. Defenders should prioritize patching and monitoring to mitigate potential local information disclosure. The CVE Program and NVD provide official records of the vulnerability, and Microsoft has released a patch for the vulnerability.

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
2026-10-13
Advisory published
2026-10-13
Advisory updated
2026-10-13

Who should care

Defenders of Windows systems, particularly those with local access, should assess exposure and apply patches. This includes administrators and security teams responsible for Windows systems, as well as operators who may be impacted by local information disclosure. Prioritization should be given to systems with high risk of local attack vectors.

Why it matters

CVE-2026-85935 is a medium-severity vulnerability in the Windows USB Driver that allows local information disclosure. Defenders should prioritize patching and monitoring.

  • Local information disclosure possible.
  • Patching required to prevent exploitation.
  • Inventory and monitoring recommended.

Technical summary

The Windows USB Driver has a buffer over-read vulnerability, allowing an authorized local attacker to disclose information. This vulnerability affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server. The vulnerability has a medium severity and requires patching to prevent exploitation. Defenders should prioritize patching and monitoring to mitigate potential local information disclosure.

Defensive priority

Medium priority given the local attack vector and medium CVSS score.

Recommended defensive actions

  • Review and apply the available patch from Microsoft.
  • Inventory Windows systems for exposure.
  • Monitor for local unauthorized access attempts.

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft has released a patch for the vulnerability. The vulnerability affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server. Defenders should verify the patch and assess exposure to ensure local information disclosure is prevented.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-85935 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-85935

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

  • CVE-2026-85935 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-85935

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Windows USB Driver Information Disclosure Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/85xxx/CVE-2026-85935.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85935

    Supplemental source - vendor-advisory, patch

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.