CVE-2026-96231: .NET Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

FAQ

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain ROOT privileges.

Affected Products (10)

Developer Tools

• Microsoft Visual Studio 2026 version 18.10
• Microsoft Visual Studio 2022 version 17.14
• .NET 8.0 installed on Mac OS
• .NET 10.0 installed on Mac OS
• .NET 9.0 installed on Mac OS
• .NET 11.0 installed on Linux
• .NET 11.0 installed on Mac OS
• .NET 8.0 installed on Linux
• .NET 10.0 installed on Linux
• .NET 9.0 installed on Linux

Security Updates (4)

• 5130034
• 5130036
• 5130035
• Release Notes

Acknowledgments

<a href="https://www.linkedin.com/in/đức-nguyễn-văn-minh-19a925287/">Nguyễn Văn Minh Đức</a> with <a href="https://saigonnewport.com.vn/">Saigon Newport Corporation</a>

Revision History

• 2026-10-13: Information published.