# KB4486760: December 2020 security update

KB4486760, released December 15, 2020, fixes 5 CVEs in Microsoft Office Web Apps 2013 Service Pack 1. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4486760
- Platform: Microsoft
- Released: Dec 15, 2020
- Priority: High (Closes CVE-2020-17123, high severity)
- CVEs: 5, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4486760

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Office Web Apps 2013 Service Pack 1](https://patchblox.com/security/data/product/microsoft/microsoft-office-web-apps-2013-service-pack-1.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-17123](https://patchblox.com/security/data/cve/CVE-2020-17123.md) | High | Microsoft Office | 7.8 | 0.0359 |  |
| [CVE-2020-17125](https://patchblox.com/security/data/cve/CVE-2020-17125.md) | High | Microsoft Office | 7.8 | 0.0346 |  |
| [CVE-2020-17129](https://patchblox.com/security/data/cve/CVE-2020-17129.md) | High | Microsoft Office | 7.8 | 0.0346 |  |
| [CVE-2020-17128](https://patchblox.com/security/data/cve/CVE-2020-17128.md) | High | Microsoft Office | 7.8 | 0.0274 |  |
| [CVE-2020-17126](https://patchblox.com/security/data/cve/CVE-2020-17126.md) | Routine | Microsoft Office | 5.5 | 0.0105 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo