# KB4484451: July 2020 security update

KB4484451, released July 14, 2020, fixes 7 CVEs across 2 products. 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/kb4484451
- Platform: Microsoft
- Released: Jul 14, 2020
- Priority: Urgent (Closes CVE-2020-1439, rated Critical)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4484451

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Office Online Server](https://patchblox.com/security/data/product/microsoft/microsoft-office-online-server.md) |  |  |
| [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-2020-1439](https://patchblox.com/security/data/cve/CVE-2020-1439.md) | Urgent | Microsoft Office | n/a | 0.2027 |  |
| [CVE-2020-1446](https://patchblox.com/security/data/cve/CVE-2020-1446.md) | High | Microsoft Office | n/a | 0.1123 |  |
| [CVE-2020-1447](https://patchblox.com/security/data/cve/CVE-2020-1447.md) | High | Microsoft Office | n/a | 0.1063 |  |
| [CVE-2020-1448](https://patchblox.com/security/data/cve/CVE-2020-1448.md) | High | Microsoft Office | n/a | 0.0996 |  |
| [CVE-2020-1342](https://patchblox.com/security/data/cve/CVE-2020-1342.md) | High | Microsoft Office SharePoint | n/a | 0.0641 |  |
| [CVE-2020-1445](https://patchblox.com/security/data/cve/CVE-2020-1445.md) | High | Microsoft Office | n/a | 0.0612 |  |
| [CVE-2020-1442](https://patchblox.com/security/data/cve/CVE-2020-1442.md) | High | Microsoft Office | n/a | 0.0173 |  |

---

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo