# KB5050187: January 2025 security update

KB5050187, released January 14, 2025, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5050187
- Platform: Microsoft
- Released: Jan 14, 2025
- Priority: High (Closes CVE-2025-21176, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5050187

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.8-on-windows-server-2022.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.8-on-windows-server-2022-server-core-installation.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.8.1-on-windows-server-2022.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.8.1-on-windows-server-2022-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-21176](https://patchblox.com/security/data/cve/CVE-2025-21176.md) | High | .NET, .NET Framework, Visual Studio | 8.8 | 0.0238 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo