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PatchSiren cyber security CVE debrief

CVE-2026-85852 Microsoft CVE debrief

A Windows Management Instrumentation Information Disclosure Vulnerability exists, allowing an authorized local attacker to disclose information due to an out-of-bounds read. Multiple Windows versions and server releases are affected. The vulnerability impacts Windows Management Instrumentation, enabling local information disclosure. Defenders and administrators should assess exposure and prioritize patching for affected systems, considering multiple Windows versions and server releases.

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 and administrators of Windows systems, particularly those using Windows Management Instrumentation, should assess exposure and prioritize patching for affected systems.

Why it matters

CVE-2026-85852 is a Windows Management Instrumentation Information Disclosure Vulnerability that allows an authorized local attacker to disclose information. Defenders should assess exposure, prioritize patching for affected systems, and monitor for potential information disclosure attempts.

  • Assess and prioritize patching for affected Windows Management Instrumentation systems to prevent potential information disclosure.
  • Monitor Windows Management Instrumentation for signs of information disclosure attempts.
  • Verify system integrity and patch application to ensure protection.

Technical summary

The vulnerability exists due to an out-of-bounds read in Windows Management Instrumentation, allowing an authorized local attacker to disclose information. Affected systems include multiple versions of Windows 10, Windows 11, and Windows Server releases.

Defensive priority

Assess exposure for Windows Management Instrumentation, prioritize patching for affected systems, and monitor for potential information disclosure attempts.

Recommended defensive actions

  • Inventory and assess exposure for Windows Management Instrumentation on affected systems
  • Prioritize and apply patches from Microsoft for affected Windows versions and server releases
  • Monitor Windows Management Instrumentation for potential information disclosure attempts
  • Verify patch application and system integrity

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft has released a patch for the affected systems. Evidence is based on CVE Program and NVD records, with Microsoft providing a patch. Affected scope and severity are detailed in official advisories. Defenders should verify patch application and system integrity, considering potential information disclosure attempts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-85852 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-85852

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

  • CVE-2026-85852 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-85852

    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.