# KB4535680: February 2020 security update

KB4535680, released February 12, 2020, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4535680
- Platform: Microsoft
- Released: Feb 12, 2020
- Priority: High (Closes CVE-2020-0689, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4535680

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-x64-based-systems.md) |  |  |
| [Windows 10 Version 1909 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1909-for-x64-based-systems.md) |  |  |
| [Windows Server, version 1803  (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-1803-server-core-installation.md) |  |  |
| [Windows Server, version 1909 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-1909-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-0689](https://patchblox.com/security/data/cve/CVE-2020-0689.md) | High | Windows Secure Boot | 8.2 | 0.0108 | Disclosed |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo