CVE-2026-96237: .NET Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:H/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

EPSS Score

0.55% (percentile: 44.5%)

Description

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to execute code over a network.

FAQ

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to take additional actions prior to exploitation to prepare the target environment.

Affected Products (11)

Developer Tools

• Microsoft Visual Studio 2026 version 18.10
• Microsoft Visual Studio 2022 version 17.14
• .NET 8.0 installed on Windows
• .NET 8.0 installed on Linux
• .NET 8.0 installed on Mac OS
• .NET 10.0 installed on Windows
• .NET 10.0 installed on Linux
• .NET 10.0 installed on Mac OS
• .NET 9.0 installed on Windows
• .NET 9.0 installed on Linux
• .NET 9.0 installed on Mac OS

Security Updates (3)

• 5130034
• 5130036
• 5130035

Acknowledgments

<a href="https://x.com/ky0tofu">Ky0toFu</a>

Revision History

• 2026-10-13: Information published.