CVE-2026-114158: Microsoft Visual Studio heap-based buffer overflow

CVE-2026-114158 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Visual Studio contains a heap-based buffer overflow vulnerability that allows a remote attacker to execute arbitrary code on a developer's machine over the network. This could enable an attacker to gain complete control of the affected system and compromise any projects or sensitive code stored on it.

Technologies: Microsoft Visual Studio, Microsoft.NetCore.App.Runtime.win-arm64 (NuGet), Microsoft.NetCore.App.Runtime.win-x64 (NuGet), Microsoft.NetCore.App.Runtime.win-x86 (NuGet). Vendors: Microsoft, NuGet.

Quick answers

Is CVE-2026-114158 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-114158 being exploited in the wild.
How severe is CVE-2026-114158?
High severity, with a CVSS score of 8.8, published 10 November 2026.
Which products and versions are affected?
Microsoft.NetCore.App.Runtime.win-arm64 (NuGet) >= 8.0.0, < 8.0.34, ECOSYSTEM:introduced=8.0.0,fixed=8.0.34; Microsoft.NetCore.App.Runtime.win-x64 (NuGet) >= 8.0.0, < 8.0.34, ECOSYSTEM:introduced=8.0.0,fixed=8.0.34; Microsoft.NetCore.App.Runtime.win-x86 (NuGet) >= 8.0.0, < 8.0.34, ECOSYSTEM:introduced=8.0.0,fixed=8.0.34.
Is there a fix for CVE-2026-114158?
Yes. Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 8.0.34 or later; Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 8.0.34 or later; Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 8.0.34 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-114158 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-114158?
Check whether you run Microsoft Visual Studio, Microsoft.NetCore.App.Runtime.win-arm64 (NuGet), Microsoft.NetCore.App.Runtime.win-x64 (NuGet) or one of the others listed 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.

How to fix

  • Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 8.0.34 or later
    dotnet add package Microsoft.NetCore.App.Runtime.win-arm64 --version 8.0.34
  • Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 8.0.34 or later
    dotnet add package Microsoft.NetCore.App.Runtime.win-x64 --version 8.0.34
  • Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 8.0.34 or later
    dotnet add package Microsoft.NetCore.App.Runtime.win-x86 --version 8.0.34

Technical details

A heap-based buffer overflow exists in Visual Studio that can be triggered remotely without prior authentication. The vulnerability allows an attacker to corrupt heap memory and achieve code execution with the privileges of the Visual Studio process. Exploitation requires network connectivity to a vulnerable Visual Studio instance but does not require user interaction beyond normal use.

Affected products

  • Microsoft Visual Studio

Identifiers

  • CVE-2026-114158
  • GHSA-r8h3-p8p6-ggp7

Timeline

  • 2026-11-10: disclosed

References

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