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CVE-2026-83852 Microsoft CVE debrief

A use-after-free vulnerability exists in the Windows Bind Filter Driver, allowing an authorized attacker to elevate privileges locally. This issue affects various versions of Windows 11 and Windows Server 2025. Microsoft has released a patch for this vulnerability. The vulnerability is caused by a use-after-free issue in the Windows Bind Filter Driver, which can be exploited by an authorized attacker to elevate privileges locally. The affected products include Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2025, and Windows Server 2025 (Server Core installation). System administrators and security teams should be

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
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

System administrators and security teams responsible for Windows 11 and Windows Server 2025 systems should assess exposure and apply the Microsoft patch.

Why it matters

This vulnerability allows an authorized attacker to elevate privileges locally on affected Windows systems. System administrators and security teams should assess exposure and apply the Microsoft patch.

  • Local privilege escalation is possible
  • Authorized attackers can exploit this vulnerability
  • Patching is required to prevent exploitation

Technical summary

The Windows Bind Filter Driver is vulnerable to a use-after-free issue, which can allow an authorized attacker to elevate privileges locally. This vulnerability affects Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2025, and Windows Server 2025 (Server Core installation).

Defensive priority

High

Recommended defensive actions

  • Apply the Microsoft patch for CVE-2026-83852
  • Review and update affected Windows 11 and Windows Server 2025 systems
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE Program and NVD provide official records of this vulnerability. Microsoft has released a vendor advisory and patch for this issue. The vulnerability is a use-after-free issue in the Windows Bind Filter Driver, which can allow an authorized attacker to elevate privileges locally. The affected products include Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2025, and Windows Server 2025 (Server Core installation).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83852 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83852

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

  • CVE-2026-83852 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83852

    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.