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PatchSiren cyber security CVE debrief

CVE-2026-85910 Microsoft CVE debrief

A buffer over-read in the Windows StateRepository API allows an authorized attacker to disclose information locally. This vulnerability affects multiple versions of Windows 11 and Windows Server 2025. Microsoft has released a patch for this vulnerability. The vulnerability requires attention from Windows administrators to apply patches and verify system exposure. The CVE Program and NVD provide official records of this vulnerability. Microsoft has released a vendor advisory with patch information.

Vendor
Microsoft
Product
Windows 11
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 patch management and vulnerability remediation. They should apply patches from Microsoft for affected Windows versions, verify and inventory affected systems for exposure, and monitor for potential local information disclosure attempts.

Why it matters

This medium-severity vulnerability requires attention from Windows administrators to apply patches and verify system exposure. The vulnerability allows authorized local attackers to disclose information via the Windows StateRepository API.

  • Potential local information disclosure
  • Need to verify and inventory affected systems
  • Apply patches from Microsoft as a priority

Technical summary

The Windows StateRepository API has a buffer over-read vulnerability that allows an authorized local attacker to disclose information. Affected products include Windows 11 versions 24H2, 25H2, 26H1, 26H2, and Windows Server 2025. The vulnerability requires attention from Windows administrators to apply patches and verify system exposure. Microsoft has released a patch for this vulnerability.

Defensive priority

Medium priority for Windows administrators to apply patches

Recommended defensive actions

  • Apply patches from Microsoft for affected Windows versions
  • Verify and inventory affected systems for exposure
  • Monitor for potential local information disclosure attempts

Evidence notes

The CVE Program and NVD provide official records of this vulnerability. Microsoft has released a vendor advisory with patch information. The vulnerability allows authorized local attackers to disclose information via the Windows StateRepository API. Affected products include Windows 11 versions 24H2, 25H2, 26H1, 26H2, and Windows Server 2025. The vulnerability requires attention from Windows administrators to apply patches and verify system exposure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-85910 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-85910

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

  • CVE-2026-85910 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-85910

    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.