# KB4593226: December 2020 cumulative update for Windows 10 1607

KB4593226, released December 8, 2020, fixes 15 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/microsoft/kb4593226
- Platform: Microsoft
- Released: Dec 8, 2020
- Priority: Urgent (Closes CVE-2020-17096, exploitation more likely)
- CVEs: 15, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4593226

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-32-bit-systems.md) |  | 14393.4104 |
| [Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-x64-based-systems.md) |  | 14393.4104 |
| [Windows Server 2016](https://patchblox.com/security/data/product/microsoft/windows-server-2016.md) |  | 14393.4104 |
| [Windows Server 2016 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2016-server-core-installation.md) |  | 14393.4104 |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-17096](https://patchblox.com/security/data/cve/CVE-2020-17096.md) | Urgent | Windows SMB | 7.5 | 0.1954 | More likely |
| [CVE-2020-17095](https://patchblox.com/security/data/cve/CVE-2020-17095.md) | Urgent | Windows Hyper-V | 8.5 | 0.0503 |  |
| [CVE-2020-17140](https://patchblox.com/security/data/cve/CVE-2020-17140.md) | High | Windows SMB | 8.1 | 0.1535 |  |
| [CVE-2020-16960](https://patchblox.com/security/data/cve/CVE-2020-16960.md) | High | Windows Backup Engine | 7.8 | 0.0127 |  |
| [CVE-2020-16961](https://patchblox.com/security/data/cve/CVE-2020-16961.md) | High | Windows Backup Engine | 7.8 | 0.0127 |  |
| [CVE-2020-16958](https://patchblox.com/security/data/cve/CVE-2020-16958.md) | High | Windows Backup Engine | 7.8 | 0.0114 |  |
| [CVE-2020-16959](https://patchblox.com/security/data/cve/CVE-2020-16959.md) | High | Windows Backup Engine | 7.8 | 0.0114 |  |
| [CVE-2020-16962](https://patchblox.com/security/data/cve/CVE-2020-16962.md) | High | Windows Backup Engine | 7.8 | 0.0114 |  |
| [CVE-2020-16963](https://patchblox.com/security/data/cve/CVE-2020-16963.md) | High | Windows Backup Engine | 7.8 | 0.0114 |  |
| [CVE-2020-16964](https://patchblox.com/security/data/cve/CVE-2020-16964.md) | High | Windows Backup Engine | 7.8 | 0.0114 |  |
| [CVE-2020-17092](https://patchblox.com/security/data/cve/CVE-2020-17092.md) | High | Microsoft Windows | 7.8 | 0.0104 |  |
| [CVE-2020-17098](https://patchblox.com/security/data/cve/CVE-2020-17098.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0140 |  |
| [CVE-2020-17138](https://patchblox.com/security/data/cve/CVE-2020-17138.md) | Routine | Microsoft Windows | 5.5 | 0.0106 |  |
| [CVE-2020-17097](https://patchblox.com/security/data/cve/CVE-2020-17097.md) | Routine | Windows Media | 3.3 | 0.0105 |  |
| [CVE-2020-17099](https://patchblox.com/security/data/cve/CVE-2020-17099.md) | Routine | Windows Lock Screen | 6.8 | 0.0100 |  |

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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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