# KB4011580: January 2018 security update

KB4011580, released January 9, 2018, fixes 4 CVEs across 5 products. 2 of them are being exploited (CVE-2018-0798); 2 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4011580
- Platform: Microsoft
- Released: Jan 9, 2018
- Priority: Patch now (Closes CVE-2018-0798, exploited (CISA KEV))
- CVEs: 4, exploited: 2, on CISA KEV: 2
- Vendor advisory: https://support.microsoft.com/help/4011580

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Office 2013 Service Pack 1 (32-bit editions)](https://patchblox.com/security/data/product/microsoft/microsoft-office-2013-service-pack-1-32-bit-editions.md) |  |  |
| [Microsoft Office 2013 Service Pack 1 (64-bit editions)](https://patchblox.com/security/data/product/microsoft/microsoft-office-2013-service-pack-1-64-bit-editions.md) |  |  |
| [Microsoft Word 2013 RT Service Pack 1](https://patchblox.com/security/data/product/microsoft/microsoft-word-2013-rt-service-pack-1.md) |  |  |
| [Microsoft Word 2013 Service Pack 1 (32-bit editions)](https://patchblox.com/security/data/product/microsoft/microsoft-word-2013-service-pack-1-32-bit-editions.md) |  |  |
| [Microsoft Word 2013 Service Pack 1 (64-bit editions)](https://patchblox.com/security/data/product/microsoft/microsoft-word-2013-service-pack-1-64-bit-editions.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-2018-0812](https://patchblox.com/security/data/cve/CVE-2018-0812.md) | High | Microsoft Office | n/a | 0.2466 |  |
| [CVE-2018-0801](https://patchblox.com/security/data/cve/CVE-2018-0801.md) | High | Microsoft Office | n/a | 0.2440 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo