CVE-2026-96229: .NET Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

EPSS Score

0.81% (percentile: 56.1%)

Description

Permissive list of allowed inputs in .NET allows an unauthorized attacker to disclose information over a network.

FAQ

What type of information could be disclosed by this vulnerability? Exploiting this vulnerability could allow the disclosure of NetNTLMv2 hashes.

Affected Products (6)

Developer Tools

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

Security Updates (4)

• Release Notes
• 5130034
• 5130035
• 5130036

Acknowledgments

nono, Ali Az, <a href="https://x.com/omarkhalil1138">Omar Khaleel</a>

Revision History

• 2026-10-13: Information published.