# KB4471320: December 2018 security update

KB4471320, released December 11, 2018, fixes 13 CVEs across 9 products. 2 of them are being exploited (CVE-2018-8639); 2 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/microsoft/kb4471320
- Platform: Microsoft
- Released: Dec 11, 2018
- Priority: Patch now (Closes CVE-2018-8639, exploited (CISA KEV, ransomware))
- CVEs: 13, exploited: 2, on CISA KEV: 2
- Vendor advisory: https://support.microsoft.com/help/4471320

## 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-2018-8639](https://patchblox.com/security/data/cve/CVE-2018-8639.md) | Patch now | Microsoft Graphics Component | 7.0 | 0.2235 | CISA KEV, Ransomware |
| [CVE-2018-8611](https://patchblox.com/security/data/cve/CVE-2018-8611.md) | Patch now | Windows Kernel | 7.0 | 0.0420 | CISA KEV |
| [CVE-2018-8631](https://patchblox.com/security/data/cve/CVE-2018-8631.md) | Urgent | Internet Explorer | 6.4 | 0.6849 | More likely |
| [CVE-2018-8619](https://patchblox.com/security/data/cve/CVE-2018-8619.md) | Urgent | Internet Explorer | 6.4 | 0.4484 | More likely |
| [CVE-2018-8625](https://patchblox.com/security/data/cve/CVE-2018-8625.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.4376 | More likely |
| [CVE-2018-8626](https://patchblox.com/security/data/cve/CVE-2018-8626.md) | Urgent | Microsoft Windows DNS | 9.8 | 0.2124 |  |
| [CVE-2018-8643](https://patchblox.com/security/data/cve/CVE-2018-8643.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.0991 | More likely |
| [CVE-2018-8596](https://patchblox.com/security/data/cve/CVE-2018-8596.md) | Urgent | Microsoft Graphics Component | 4.7 | 0.0707 | More likely |
| [CVE-2018-8595](https://patchblox.com/security/data/cve/CVE-2018-8595.md) | Urgent | Microsoft Graphics Component | 4.7 | 0.0692 | More likely |
| [CVE-2018-8477](https://patchblox.com/security/data/cve/CVE-2018-8477.md) | Urgent | Windows Kernel | 3.3 | 0.0180 | More likely |
| [CVE-2018-8641](https://patchblox.com/security/data/cve/CVE-2018-8641.md) | Urgent | Windows Kernel-Mode Drivers | 7.0 | 0.0112 | More likely |
| [CVE-2018-8514](https://patchblox.com/security/data/cve/CVE-2018-8514.md) | Routine | Microsoft Windows DNS | 3.3 | 0.0189 |  |
| [CVE-2018-8622](https://patchblox.com/security/data/cve/CVE-2018-8622.md) | Routine | Windows Kernel | 4.7 | 0.0184 |  |

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Data as of 2026-11-07T18:46:35Z 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

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