Summary
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.
Products covered
.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
Remediation
Release Notes Install KB5093446. Install KB5093447. Install KB5093448.
Vendor-listed fixes
10.0.8
8.0.27
9.0.16
18.5.3
17.14.32
17.12.20
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- Added to SecurityAlert
We collected the advisory from the official source.
- Confirmed at the source
Our collector saw this advisory during a later source check.