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Microsoft Security Response CenterCVE-2026-34332

Windows Kernel-Mode Driver Remote Code Execution Vulnerability

HighVendor CVSS 8.0 / 10 1 CVE Published May 12, 2026 at 7:00 AM UTC

Summary

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network.

Products covered

  • Windows Server 2025 (Server Core installation)

  • Windows Server 2025

Remediation

Install KB5087539. Install KB5087423.

Vendor-listed fixes

  • 10.0.26100.32860

  • 10.0.26100.32772

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.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.