# KB5093446: May 2026 security update

KB5093446, released May 12, 2026, fixes 4 CVEs across 3 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5093446
- Platform: Microsoft
- Released: May 12, 2026
- Priority: High (Closes CVE-2026-42899, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5093446

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [.NET 10.0 runtime installed on Linux](https://patchblox.com/security/data/product/microsoft/net-10.0-runtime-installed-on-linux.md) |  |  |
| [.NET 10.0 runtime installed on Mac OS](https://patchblox.com/security/data/product/microsoft/net-10.0-runtime-installed-on-mac-os.md) |  |  |
| [.NET 10.0 runtime installed on Windows](https://patchblox.com/security/data/product/microsoft/net-10.0-runtime-installed-on-windows.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-42899](https://patchblox.com/security/data/cve/CVE-2026-42899.md) | High | ASP.NET Core | 7.5 | 0.0243 |  |
| [CVE-2026-35433](https://patchblox.com/security/data/cve/CVE-2026-35433.md) | High | .NET | 7.3 | 0.0077 |  |
| [CVE-2026-32177](https://patchblox.com/security/data/cve/CVE-2026-32177.md) | High | .NET | 7.3 | 0.0064 |  |
| [CVE-2026-32175](https://patchblox.com/security/data/cve/CVE-2026-32175.md) | Routine | .NET | 4.3 | 0.0071 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo