# KB4601054: February 2021 security update

KB4601054, released February 9, 2021, fixes 1 CVE across 2 products. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4601054
- Platform: Microsoft
- Released: Feb 9, 2021
- Priority: High (Closes CVE-2021-24111, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4601054

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.8-on-windows-10-version-1803-for-32-bit-systems.md) |  |  |
| [Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.8-on-windows-10-version-1803-for-x64-based-systems.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-24111](https://patchblox.com/security/data/cve/CVE-2021-24111.md) | High | .NET Framework | 7.5 | 0.0384 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo