# KB4586817: November 2020 security update

KB4586817, released November 10, 2020, fixes 14 CVEs across 4 products. One of them is being exploited (CVE-2020-17087); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4586817
- Platform: Microsoft
- Released: Nov 10, 2020
- Priority: Patch now (Closes CVE-2020-17087, exploited (CISA KEV))
- CVEs: 14, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/4586817

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows Server 2008 for 32-bit Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2.md) |  |  |
| [Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2-server-core-installation.md) |  |  |
| [Windows Server 2008 for x64-based Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2.md) |  |  |
| [Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-17087](https://patchblox.com/security/data/cve/CVE-2020-17087.md) | Patch now | Windows Kernel | 7.8 | 0.0543 | CISA KEV, Disclosed |
| [CVE-2020-17051](https://patchblox.com/security/data/cve/CVE-2020-17051.md) | Urgent | Microsoft Windows | 9.8 | 0.1062 | More likely |
| [CVE-2020-17042](https://patchblox.com/security/data/cve/CVE-2020-17042.md) | Urgent | Microsoft Windows | 8.8 | 0.0511 |  |
| [CVE-2020-17088](https://patchblox.com/security/data/cve/CVE-2020-17088.md) | Urgent | Windows Common Log File System Driver | 7.8 | 0.0088 | More likely |
| [CVE-2020-17043](https://patchblox.com/security/data/cve/CVE-2020-17043.md) | High | Microsoft Windows | 7.8 | 0.0285 |  |
| [CVE-2020-17011](https://patchblox.com/security/data/cve/CVE-2020-17011.md) | High | Microsoft Windows | 7.8 | 0.0104 |  |
| [CVE-2020-17001](https://patchblox.com/security/data/cve/CVE-2020-17001.md) | High | Microsoft Windows | 7.8 | 0.0100 |  |
| [CVE-2020-17068](https://patchblox.com/security/data/cve/CVE-2020-17068.md) | High | Microsoft Graphics Component | 7.8 | 0.0098 |  |
| [CVE-2020-17014](https://patchblox.com/security/data/cve/CVE-2020-17014.md) | High | Microsoft Windows | 7.8 | 0.0095 |  |
| [CVE-2020-1599](https://patchblox.com/security/data/cve/CVE-2020-1599.md) | Routine | Microsoft Windows | 5.5 | 0.1912 |  |
| [CVE-2020-17036](https://patchblox.com/security/data/cve/CVE-2020-17036.md) | Routine | Microsoft Windows | 5.5 | 0.0139 |  |
| [CVE-2020-17045](https://patchblox.com/security/data/cve/CVE-2020-17045.md) | Routine | Microsoft Windows | 5.5 | 0.0139 |  |
| [CVE-2020-17004](https://patchblox.com/security/data/cve/CVE-2020-17004.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0131 |  |
| [CVE-2020-17069](https://patchblox.com/security/data/cve/CVE-2020-17069.md) | Routine | Windows NDIS | 5.5 | 0.0111 |  |

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Data as of 2026-11-07T12:40:37Z 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