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Microsoft Security Response CenterCVE-2026-62824

Remote Desktop Client Remote Code Execution Vulnerability

Stack-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Read the vendor bulletin Get alerts for Windows
8.8CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)

Versions the vendor lists as fixed

  • 10.0.14393.9418
  • 6.2.9200.26280
  • 6.3.9600.23338
Next step

What the vendor recommends

Install KB5120418. Install KB5120386. Install KB5120385.

Review the complete instructions on the vendor's site
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed its remediation guidance.
Timeline

When this advisory changed

  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.

Vulnerabilities

CVEs named in this advisory

CVE-2026-62824View CVSS, KEV, EPSS, and threat context
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