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Microsoft Security Response CenterCVE-2026-42913

Remote Desktop Client Remote Code Execution Vulnerability

HighVendor CVSS 7.5 / 10 1 CVE Published Jun 9, 2026 at 7:00 AM UTC

Summary

Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Products covered

  • Remote Desktop client for Windows Desktop

  • Windows Server 2022

  • Windows Server 2022 (Server Core installation)

  • Windows Server 2025 (Server Core installation)

  • Windows 11 Version 25H2 for ARM64-based Systems

  • Windows 11 Version 25H2 for x64-based Systems

  • Windows 11 Version 23H2 for ARM64-based Systems

  • Windows 11 Version 23H2 for x64-based Systems

Show 5 more products
  • Windows 11 Version 24H2 for ARM64-based Systems

  • Windows 11 Version 24H2 for x64-based Systems

  • Windows Server 2025

  • Windows 11 version 26H1 for x64-based Systems

  • Windows 11 Version 26H1 for ARM64-based Systems

Remediation

Release Notes Install KB5094128. Install KB5094125. Install KB5094126. Install KB5093998. Install KB5095051.

Vendor-listed fixes

  • 1.2.7214.0

  • 10.0.20348.5256

  • 10.0.26100.32995

  • 10.0.26200.8655

  • 10.0.22631.7219

  • 10.0.26100.8655

  • 10.0.28000.2269

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.