# KB4493163: January 2021 security update

KB4493163, released January 12, 2021, fixes 7 CVEs in Microsoft SharePoint Enterprise Server 2016. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4493163
- Platform: Microsoft
- Released: Jan 12, 2021
- Priority: Urgent (Closes CVE-2021-1707, exploitation more likely)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4493163

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft SharePoint Enterprise Server 2016](https://patchblox.com/security/data/product/microsoft/microsoft-sharepoint-enterprise-server-2016.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-1707](https://patchblox.com/security/data/cve/CVE-2021-1707.md) | Urgent | Microsoft Office SharePoint | 8.8 | 0.0387 | More likely |
| [CVE-2021-1715](https://patchblox.com/security/data/cve/CVE-2021-1715.md) | High | Microsoft Office | 7.8 | 0.0389 |  |
| [CVE-2021-1716](https://patchblox.com/security/data/cve/CVE-2021-1716.md) | High | Microsoft Office | 7.8 | 0.0389 |  |
| [CVE-2021-1719](https://patchblox.com/security/data/cve/CVE-2021-1719.md) | High | Microsoft Office SharePoint | 8.0 | 0.0240 |  |
| [CVE-2021-1712](https://patchblox.com/security/data/cve/CVE-2021-1712.md) | High | Microsoft Office SharePoint | 8.0 | 0.0237 |  |
| [CVE-2021-1641](https://patchblox.com/security/data/cve/CVE-2021-1641.md) | Routine | Microsoft Office SharePoint | 4.6 | 0.0198 |  |
| [CVE-2021-1717](https://patchblox.com/security/data/cve/CVE-2021-1717.md) | Routine | Microsoft Office SharePoint | 4.6 | 0.0198 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo