CVE-2026-50528: .NET Security Feature Bypass Vulnerability

Overview

Severity

High (CVSS 8.2)

CVSS Vector

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

Category

Security Feature Bypass

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Jul

Released

2026-07-14

Description

Incorrect authorization in .NET allows an unauthorized attacker to bypass a security feature over a network.

FAQ

What kind of security feature could be bypassed by successfully exploiting this vulnerability? The authentication feature could be bypassed as this vulnerability allows impersonation.

Affected Products (11)

Developer Tools

• Microsoft Visual Studio 2022 version 17.12
• .NET 10.0 installed on Linux
• .NET 10.0 installed on Mac OS
• .NET 8.0 installed on Linux
• .NET 8.0 installed on Mac OS
• .NET 8.0 installed on Windows
• .NET 9.0 installed on Linux
• .NET 9.0 installed on Mac OS
• .NET 9.0 installed on Windows
• Microsoft Visual Studio 2022 version 17.14
• Microsoft Visual Studio 2026 version 18.7

Security Updates (6)

• Release Notes
• 5104034
• 5104032
• 5104033
• Release Notes
• Release Notes

Acknowledgments

<a href="https://x.com/ky0tofu">Ky0toFu</a>, Henrique Pereira with Microsoft

Revision History

• 2026-07-14: Information published.