# KB4011643: January 2018 security update

KB4011643, released January 9, 2018, fixes 16 CVEs across 2 products. 2 of them are being exploited (CVE-2018-0798); 2 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/microsoft/kb4011643
- Platform: Microsoft
- Released: Jan 9, 2018
- Priority: Patch now (Closes CVE-2018-0798, exploited (CISA KEV))
- CVEs: 16, exploited: 2, on CISA KEV: 2
- Vendor advisory: https://support.microsoft.com/help/4011643

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Word 2016 (32-bit edition)](https://patchblox.com/security/data/product/microsoft/microsoft-word-2016-32-bit-edition.md) |  |  |
| [Microsoft Word 2016 (64-bit edition)](https://patchblox.com/security/data/product/microsoft/microsoft-word-2016-64-bit-edition.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2018-0798](https://patchblox.com/security/data/cve/CVE-2018-0798.md) | Patch now | Microsoft Office | n/a | 0.9512 | CISA KEV |
| [CVE-2018-0802](https://patchblox.com/security/data/cve/CVE-2018-0802.md) | Patch now | Microsoft Office | n/a | 0.9329 | CISA KEV, Ransomware |
| [CVE-2018-0797](https://patchblox.com/security/data/cve/CVE-2018-0797.md) | Urgent | Microsoft Office | n/a | 0.2466 |  |
| [CVE-2018-0794](https://patchblox.com/security/data/cve/CVE-2018-0794.md) | Urgent | Microsoft Office | n/a | 0.2007 | More likely |
| [CVE-2018-0792](https://patchblox.com/security/data/cve/CVE-2018-0792.md) | High | Microsoft Office | n/a | 0.2834 |  |
| [CVE-2018-0812](https://patchblox.com/security/data/cve/CVE-2018-0812.md) | High | Microsoft Office | n/a | 0.2466 |  |
| [CVE-2018-0806](https://patchblox.com/security/data/cve/CVE-2018-0806.md) | High | Microsoft Office | n/a | 0.2450 |  |
| [CVE-2018-0801](https://patchblox.com/security/data/cve/CVE-2018-0801.md) | High | Microsoft Office | n/a | 0.2440 |  |
| [CVE-2018-0805](https://patchblox.com/security/data/cve/CVE-2018-0805.md) | High | Microsoft Office | n/a | 0.2440 |  |
| [CVE-2018-0807](https://patchblox.com/security/data/cve/CVE-2018-0807.md) | High | Microsoft Office | n/a | 0.2440 |  |
| [CVE-2018-0793](https://patchblox.com/security/data/cve/CVE-2018-0793.md) | High | Microsoft Office | n/a | 0.2057 |  |
| [CVE-2018-0848](https://patchblox.com/security/data/cve/CVE-2018-0848.md) | High | Microsoft Office | n/a | 0.2049 |  |
| [CVE-2018-0845](https://patchblox.com/security/data/cve/CVE-2018-0845.md) | High | Microsoft Office | n/a | 0.1973 |  |
| [CVE-2018-0849](https://patchblox.com/security/data/cve/CVE-2018-0849.md) | High | Microsoft Office | n/a | 0.1864 |  |
| [CVE-2018-0862](https://patchblox.com/security/data/cve/CVE-2018-0862.md) | High | Microsoft Office | n/a | 0.1864 |  |
| [CVE-2018-0804](https://patchblox.com/security/data/cve/CVE-2018-0804.md) | Routine | Microsoft Office | n/a | 0.2440 |  |

---

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