Affected: Microsoft .NET 10.0, Microsoft .NET 8.0, Microsoft .NET 9.0, Microsoft Visual Studio 2022 version 17.12, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.5

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.