# Microsoft Visual Studio heap-based buffer overflow

Source: https://junglewise.ai/threats/duplicate-advisory-microsoft-security-advisory-visual-studio-remote-ba83a5c9  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10  
License: CC BY 4.0 with a link back

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

Visual Studio, Microsoft's software development platform, contains a heap-based buffer overflow vulnerability that could allow an attacker to execute arbitrary code remotely. An attacker can exploit this over the network if a user interacts with a malicious input, potentially compromising the developer's system and all code they work with.

Technologies: [Microsoft.NetCore.App.Runtime.win-x86 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-win-x86). Vendors: [NuGet](https://junglewise.ai/threats/vendors/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.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.

**Am I affected?** Check whether you run 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.

## Affected products

- Microsoft.NetCore.App.Runtime.win-x86 (NuGet) >= 8.0.0, < 8.0.34, ECOSYSTEM:introduced=8.0.0

## Related threats

- [Microsoft Visual Studio heap buffer overflow RCE](https://junglewise.ai/threats/duplicate-advisory-microsoft-security-advisory-visual-studio-remote-224be73b)
- [Microsoft Visual Studio heap-based buffer overflow](https://junglewise.ai/threats/duplicate-advisory-microsoft-security-advisory-visual-studio-remote-6a4b9d28)
- [Microsoft Visual Studio deserialization remote code execution](https://junglewise.ai/threats/duplicate-advisory-microsoft-security-advisory-visual-studio-remote-1eb2f932)
- [Microsoft Visual Studio stack-based buffer overflow](https://junglewise.ai/threats/duplicate-advisory-microsoft-security-advisory-visual-studio-remote-d956164d)
- [Microsoft .NET algorithmic complexity denial of service](https://junglewise.ai/threats/cve-2026-120796-inefficient-algorithmic-complexity-in-net-allows-an-unauthorized)