CVE-2026-96235: .NET Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.

FAQ

According to the CVSS metric, the attack vector is network (AV:N) and user interaction is required (UI:R). What is the target context of the remote code execution? This attack requires a user to open a specially crafted file from the attacker to initiate remote code execution.

Affected Products (6)

Developer Tools

• .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
• Microsoft Visual Studio 2026 version 18.10
• .NET 11.0 installed on Windows

Security Updates (4)

• 5130036
• 5130034
• 5130035
• Release Notes

Acknowledgments

<a href="https://www.linkedin.com/in/mateusz-mto-gierblinski/">Mateusz Gierblinski</a> with <a href="https://curios-it.eu/">Curios</a>

Revision History

• 2026-10-13: Information published.