# KB5002028: October 2021 security update

KB5002028, released October 12, 2021, fixes 6 CVEs in Microsoft SharePoint Server 2019. 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/kb5002028
- Platform: Microsoft
- Released: Oct 12, 2021
- Priority: Urgent (Closes CVE-2021-40487, exploitation more likely)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5002028

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft SharePoint Server 2019](https://patchblox.com/security/data/product/microsoft/microsoft-sharepoint-server-2019.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-40487](https://patchblox.com/security/data/cve/CVE-2021-40487.md) | Urgent | Microsoft Office SharePoint | 8.1 | 0.4821 | More likely |
| [CVE-2021-41344](https://patchblox.com/security/data/cve/CVE-2021-41344.md) | Urgent | Microsoft Office SharePoint | 8.1 | 0.0648 | More likely |
| [CVE-2021-40486](https://patchblox.com/security/data/cve/CVE-2021-40486.md) | Urgent | Microsoft Office Word | 7.8 | 0.0599 |  |
| [CVE-2021-40483](https://patchblox.com/security/data/cve/CVE-2021-40483.md) | High | Microsoft Office SharePoint | 7.6 | 0.0138 |  |
| [CVE-2021-40484](https://patchblox.com/security/data/cve/CVE-2021-40484.md) | High | Microsoft Office SharePoint | 7.6 | 0.0138 |  |
| [CVE-2021-40482](https://patchblox.com/security/data/cve/CVE-2021-40482.md) | Routine | Microsoft Office SharePoint | 5.3 | 0.0233 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo