PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-96851 Microsoft CVE debrief

A buffer over-read in Windows Management Instrumentation allows an authorized attacker to disclose information locally. Multiple Windows versions are affected, including Windows 10, Windows 11, and Windows Server. This vulnerability requires local access and authorization, but can lead to information disclosure. Defenders should assess exposure and apply patches. The vulnerability is caused by a buffer over-read in Windows Management Instrumentation, allowing an authorized attacker to disclose information locally. The vulnerability affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server. Defenders should verify local access controls and authorization

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 responsible for Windows systems, particularly those with local access and authorization, should assess exposure and apply patches.

Why it matters

The vulnerability requires local access and authorization, but can lead to information disclosure. Defenders should assess exposure and apply patches.

  • Defenders should verify local access controls and authorization for Windows Management Instrumentation.
  • Apply patches from Microsoft for affected Windows versions to prevent information disclosure.
  • Monitor for unusual activity related to Windows Management Instrumentation to detect potential exploitation.
  • Verify the integrity of Windows Management Instrumentation configurations and data.

Technical summary

The vulnerability is caused by a buffer over-read in Windows Management Instrumentation, allowing an authorized attacker to disclose information locally. The vulnerability affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server.

Defensive priority

Medium priority for defenders, as the vulnerability requires local access and authorization.

Recommended defensive actions

  • Review and apply patches from Microsoft for affected Windows versions.
  • Verify local access controls and authorization for Windows Management Instrumentation.
  • Monitor for unusual activity related to Windows Management Instrumentation.

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact. Evidence is based on CVE Program and NVD sources, with limited additional context. The vulnerability requires local access and authorization, but can lead to information disclosure. Defenders should assess exposure and apply patches from Microsoft for affected Windows versions to prevent information disclosure. The CVE record was published on 2026-10-13T

Sources and references

Verified primary and authoritative sources

  • CVE-2026-96851 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-96851

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

  • CVE-2026-96851 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-96851

    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.