# KB3198800: December 2016 security update

KB3198800, released December 13, 2016, fixes 6 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/kb3198800
- Platform: Microsoft
- Released: Dec 13, 2016
- Priority: Urgent (Closes CVE-2016-7274, exploitation more likely)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/3198800

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Excel 2016 for Mac](https://patchblox.com/security/data/product/microsoft/microsoft-excel-2016-for-mac.md) |  |  |
| [Microsoft Office 2016 for Mac](https://patchblox.com/security/data/product/microsoft/microsoft-office-2016-for-mac.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2016-7274](https://patchblox.com/security/data/cve/CVE-2016-7274.md) | Urgent | Microsoft Office | 6.4 | 0.4049 | More likely |
| [CVE-2016-7266](https://patchblox.com/security/data/cve/CVE-2016-7266.md) | Urgent | Microsoft Office | n/a | 0.2279 | More likely |
| [CVE-2016-7276](https://patchblox.com/security/data/cve/CVE-2016-7276.md) | High | Microsoft Office | n/a | 0.2541 |  |
| [CVE-2016-7264](https://patchblox.com/security/data/cve/CVE-2016-7264.md) | High | Microsoft Office | n/a | 0.2321 |  |
| [CVE-2016-7263](https://patchblox.com/security/data/cve/CVE-2016-7263.md) | High | Microsoft Office | n/a | 0.1970 |  |
| [CVE-2016-7257](https://patchblox.com/security/data/cve/CVE-2016-7257.md) | Routine | Microsoft Office | 6.7 | 0.2268 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo