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Microsoft Security Response CenterCVE-2026-71328

.NET and Visual Studio Remote Code Execution Vulnerability

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

Read the vendor bulletin Get alerts for Microsoft Visual Studio
8.8CVSS out of 10High severity
Scope

What the vendor says is affected

  • Microsoft Visual Studio 2026 version 18.9
  • .NET 10.0 installed on Windows
  • .NET 8.0 installed on Windows
  • .NET 9.0 installed on Windows
  • Microsoft Visual Studio 2022 version 17.14
  • .NET 11.0 installed on Windows

Versions the vendor lists as fixed

  • 18.9.3
  • 10.0.12
  • 8.0.31
  • 9.0.20
  • 17.14.40
  • 11.0 RC1
Next step

What the vendor recommends

Release Notes Install KB5126106. Install KB5126104. Install KB5126105.

Review the complete instructions on the vendor's site
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-2026-71328View CVSS, KEV, EPSS, and threat context
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