# .NET 9.0 installed on Windows security updates

Patch Radar has 2 security fixes for .NET 9.0 installed on Windows, closing 16 CVEs, 1 of which is being exploited. The newest security fix is KB5135242, released November 10, 2026.

- Web page: https://patchblox.com/security/product/microsoft/net-9.0-installed-on-windows
- Platform: Microsoft
- Vendor: Microsoft
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [KB5135242](https://patchblox.com/security/data/fix/microsoft/kb5135242.md) | Nov 10, 2026 |  | High | 14 | 0 |
| [KB5133965](https://patchblox.com/security/data/fix/microsoft/kb5133965.md) | Oct 25, 2026 |  | Patch now | 3 | 1 |

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Data as of 2026-11-11T07:45:43Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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