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Microsoft Security Response CenterCVE-2026-32175

.NET Core Tampering Vulnerability

HighVendor CVSS 4.3 / 10 1 CVE Published May 12, 2026 at 7:00 AM UTC

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

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.