# KB4074594: February 2018 security update

KB4074594, released February 13, 2018, fixes 14 CVEs across 9 products. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/microsoft/kb4074594
- Platform: Microsoft
- Released: Feb 13, 2018
- Priority: Urgent (Closes CVE-2018-0840, exploitation more likely)
- CVEs: 14, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4074594

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Internet Explorer 11 on Windows 8.1 for 32-bit systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-8.1-for-32-bit-systems.md) |  |  |
| [Internet Explorer 11 on Windows 8.1 for x64-based systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-8.1-for-x64-based-systems.md) |  |  |
| [Internet Explorer 11 on Windows RT 8.1](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-rt-8.1.md) |  |  |
| [Internet Explorer 11 on Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-server-2012-r2.md) |  |  |
| [Windows 8.1 for 32-bit systems](https://patchblox.com/security/data/product/microsoft/windows-8.1-for-32-bit-systems.md) |  |  |
| [Windows 8.1 for x64-based systems](https://patchblox.com/security/data/product/microsoft/windows-8.1-for-x64-based-systems.md) |  |  |
| [Windows RT 8.1](https://patchblox.com/security/data/product/microsoft/windows-rt-8.1.md) |  |  |
| [Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2.md) |  |  |
| [Windows Server 2012 R2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2018-0840](https://patchblox.com/security/data/cve/CVE-2018-0840.md) | Urgent | Microsoft Browsers | 4.2 | 0.5307 | More likely |
| [CVE-2018-0866](https://patchblox.com/security/data/cve/CVE-2018-0866.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.4364 | More likely |
| [CVE-2018-0825](https://patchblox.com/security/data/cve/CVE-2018-0825.md) | Urgent | Microsoft Windows | 8.1 | 0.1648 | More likely |
| [CVE-2018-0847](https://patchblox.com/security/data/cve/CVE-2018-0847.md) | Urgent | Microsoft Windows | 4.3 | 0.0593 | More likely |
| [CVE-2018-0742](https://patchblox.com/security/data/cve/CVE-2018-0742.md) | Urgent | Windows Kernel | 7.0 | 0.0124 | More likely |
| [CVE-2018-0820](https://patchblox.com/security/data/cve/CVE-2018-0820.md) | Urgent | Microsoft Windows | 7.0 | 0.0124 | More likely |
| [CVE-2018-0844](https://patchblox.com/security/data/cve/CVE-2018-0844.md) | Urgent | Common Log File System Driver | 7.8 | 0.0122 | More likely |
| [CVE-2018-0846](https://patchblox.com/security/data/cve/CVE-2018-0846.md) | Urgent | Common Log File System Driver | 7.8 | 0.0122 | More likely |
| [CVE-2018-0842](https://patchblox.com/security/data/cve/CVE-2018-0842.md) | Urgent | Windows Kernel | 6.7 | 0.0102 | More likely |
| [CVE-2018-0833](https://patchblox.com/security/data/cve/CVE-2018-0833.md) | Routine | Windows SMB Server | 4.8 | 0.4016 |  |
| [CVE-2018-0832](https://patchblox.com/security/data/cve/CVE-2018-0832.md) | Routine | Windows Kernel | 4.7 | 0.0234 |  |
| [CVE-2018-0829](https://patchblox.com/security/data/cve/CVE-2018-0829.md) | Routine | Windows Kernel | 4.7 | 0.0204 |  |
| [CVE-2018-0830](https://patchblox.com/security/data/cve/CVE-2018-0830.md) | Routine | Windows Kernel | 4.7 | 0.0204 |  |
| [CVE-2018-0757](https://patchblox.com/security/data/cve/CVE-2018-0757.md) | Routine | Windows Kernel | 4.7 | 0.0158 |  |

---

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