Microsoft Visual Studio stack-based buffer overflow

Severity: high · CVSS 8.8 · Published 2026-11-10

Visual Studio, a widely-used development environment, contains a stack-based buffer overflow vulnerability that allows an attacker to execute arbitrary code over the network with user interaction. An attacker can exploit this to gain complete control of a developer's machine, potentially compromising source code, credentials, and build systems. This advisory has been withdrawn as a duplicate of GHSA-xf35-v9jh-g65w.

Technologies: Microsoft Visual Studio, Microsoft.NetCore.App.Runtime.win-x86 (NuGet). Vendors: Microsoft, NuGet.

Quick answers

Is This vulnerability exploited in the wild?
No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?
High severity, with a CVSS score of 8.8, published 10 November 2026.
Which products and versions are affected?
Microsoft .NET Core App Runtime (win-x86) >= 8.0.0, < 8.0.34; Microsoft.NetCore.App.Runtime.win-x86 (NuGet) >= 8.0.0, < 8.0.34, ECOSYSTEM:introduced=8.0.0.
Is there a fix for This vulnerability?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is This vulnerability attacked?
It is attacked over the network.
Am I affected?
Check whether you run Microsoft .NET Core App Runtime (win-x86), Microsoft Visual Studio or Microsoft.NetCore.App.Runtime.win-x86 (NuGet) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Stack-based buffer overflow in Visual Studio's .NET Core runtime (specifically Microsoft.NETCore.App.Runtime.win-x86) allows remote code execution over the network. The vulnerability requires user interaction and affects versions 8.0.0 through 8.0.33. No patched version is currently identified in this advisory.

Affected products

  • Microsoft Visual Studio
  • Microsoft .NET Core App Runtime (win-x86) >= 8.0.0, < 8.0.34

Timeline

  • 2026-11-10: disclosed
  • 2026-11-11: advisory: Advisory withdrawn as duplicate of GHSA-xf35-v9jh-g65w

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.