# CVE-2026-32175: .NET Core Tampering Vulnerability

CVE-2026-32175 is fixed in 4 products on 2 platforms, first by KB5093446, released May 12, 2026. 3 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-32175
- Priority: Routine
- CVSS: 4.3 (Important)
- EPSS: 0.0071
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: May 12, 2026
- Weakness: Absolute Path Traversal
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32175

## Description

<p>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.</p> <p>To exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system.</p> <p>The security update fixes the vulnerability by ensuring .NET Core properly handles files.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | .NET 10.0 runtime installed on Windows |  | [KB5093446](https://patchblox.com/security/data/fix/microsoft/kb5093446.md) | May 12, 2026 |
| Microsoft | .NET 8.0 runtime installed on Windows |  | [KB5093447](https://patchblox.com/security/data/fix/microsoft/kb5093447.md) | May 12, 2026 |
| Microsoft | .NET 9.0 runtime installed on Windows |  | [KB5093448](https://patchblox.com/security/data/fix/microsoft/kb5093448.md) | May 12, 2026 |
| Windows apps | Microsoft .NET Windows Desktop Runtime 8.0 | 8.0.30 | [Microsoft .NET Windows Desktop Runtime 8.0 8.0.30](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.desktopruntime.8-8.0.30.md) | Jul 23, 2026 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | Microsoft Windows Desktop Runtime - 8.0.25 (arm64) | no-fix |
| Windows apps | Microsoft Windows Desktop Runtime - 8.0.25 (x64) | no-fix |
| Windows apps | Microsoft Windows Desktop Runtime - 8.0.25 (x86) | no-fix |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.