# Microsoft .NET Framework 4.8 on Windows RT 8.1 security updates

Patch Radar has 12 security fixes for Microsoft .NET Framework 4.8 on Windows RT 8.1, closing 20 CVEs, 2 of which are being exploited. The newest security fix is KB5021093, released December 13, 2022. This product is no longer supported.

- Web page: https://patchblox.com/security/product/microsoft/microsoft-.net-framework-4.8-on-windows-rt-8.1
- Platform: Microsoft
- Vendor: Microsoft
- Supported: no

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [KB5021093](https://patchblox.com/security/data/fix/microsoft/kb5021093.md) | Dec 13, 2022 |  | High | 1 | 0 |
| [KB5020690](https://patchblox.com/security/data/fix/microsoft/kb5020690.md) | Nov 8, 2022 |  | Routine | 1 | 0 |
| [KB5012331](https://patchblox.com/security/data/fix/microsoft/kb5012331.md) | Apr 19, 2022 |  | High | 1 | 0 |
| [KB5009721](https://patchblox.com/security/data/fix/microsoft/kb5009721.md) | Jan 11, 2022 |  | High | 1 | 0 |
| [KB4603004](https://patchblox.com/security/data/fix/microsoft/kb4603004.md) | Feb 9, 2021 |  | High | 1 | 0 |
| [KB4579979](https://patchblox.com/security/data/fix/microsoft/kb4579979.md) | Oct 13, 2020 |  | Patch now | 2 | 1 |
| [KB4570508](https://patchblox.com/security/data/fix/microsoft/kb4570508.md) | Aug 11, 2020 |  | Urgent | 2 | 0 |
| [KB4556401](https://patchblox.com/security/data/fix/microsoft/kb4556401.md) | May 14, 2020 |  | Urgent | 2 | 0 |
| [KB4535104](https://patchblox.com/security/data/fix/microsoft/kb4535104.md) | Jan 14, 2020 |  | Patch now | 3 | 1 |
| [KB4514604](https://patchblox.com/security/data/fix/microsoft/kb4514604.md) | Sep 10, 2019 |  | High | 1 | 0 |
| [KB4507422](https://patchblox.com/security/data/fix/microsoft/kb4507422.md) | Jul 9, 2019 |  | Urgent | 3 | 0 |
| [KB4499408](https://patchblox.com/security/data/fix/microsoft/kb4499408.md) | May 14, 2019 |  | High | 4 | 0 |

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Data as of 2026-11-12T07:53:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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