CVE-2026-32175: .NET Core Tampering Vulnerability

Overview

Severity

Medium (CVSS 4.3)

CVSS Vector

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

Category

Tampering

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-May

Released

2026-05-12

Last Updated

2026-05-19

EPSS Score

0.71% (percentile: 48.9%)

Description

A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker who successfully exploited this vulnerability could write arbitrary files and directories to certain locations on a vulnerable system. However, an attacker would have limited control over the destination of the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles files.

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 2026 version 18.5
• Microsoft Visual Studio 2022 version 17.14
• Microsoft Visual Studio 2022 version 17.12

Security Updates (6)

• 5093446
• 5093447
• 5093448
• Release Notes
• Release Notes
• Release Notes

Acknowledgments

Anonymous, Radek Zikmund with Microsoft s.r.o.

Revision History

• 2026-05-12: Information published.
• 2026-05-19: Removed incorrectly added rows from the Security Updates table. This is an informational change only.