# KB4504709: April 2021 security update

KB4504709, released April 13, 2021, fixes 1 CVE in Microsoft SharePoint Foundation 2010 Service Pack 2. None of them is reported as exploited. Patch Radar priority: Routine. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4504709
- Platform: Microsoft
- Released: Apr 13, 2021
- Priority: Routine (Closes CVE-2021-28450)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4504709

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft SharePoint Foundation 2010 Service Pack 2](https://patchblox.com/security/data/product/microsoft/microsoft-sharepoint-foundation-2010-service-pack-2.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-28450](https://patchblox.com/security/data/cve/CVE-2021-28450.md) | Routine | Microsoft Office SharePoint | 5.0 | 0.0256 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo