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Microsoft Security Response CenterCVE-2026-88245

Windows Brokering File System Elevation of Privilege Vulnerability

HighVendor CVSS 7.8 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC

Summary

Missing authentication for critical function in Windows Brokering File System allows an authorized attacker to elevate privileges locally.

Products covered

  • Windows Server 2025

  • Windows Server 2025 (Server Core installation)

Remediation

Install KB5131080. Install KB5131077.

Vendor-listed fixes

  • 10.0.26100.33822

  • 10.0.26100.33730

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.