Search threats, CVEs… ⌘K
Back to vendor advisories
Microsoft Security Response CenterCVE-2026-32175

.NET Core Tampering Vulnerability

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.

Read the vendor bulletin Get alerts for NET 10.0 installed on Windows
4.3CVSS out of 10High severity
Scope

What the vendor says is affected

  • .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

Versions the vendor lists as fixed

  • 10.0.8
  • 8.0.27
  • 9.0.16
  • 18.5.3
  • 17.14.32
  • 17.12.20
Next step

What the vendor recommends

Release Notes Install KB5093446. Install KB5093447. Install KB5093448.

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  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.

Vulnerabilities

CVEs named in this advisory

CVE-2026-32175View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor