# CVE-2020-16922: Windows Spoofing Vulnerability

CVE-2020-16922 is fixed in 44 products on 1 platform, first by KB4580346, released October 13, 2020. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2020-16922
- Priority: Urgent
- CVSS: 5.3 (Important)
- EPSS: 0.0081
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Oct 13, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-16922

## Description

<p>A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files.</p> <p>In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded.</p> <p>The update addresses the vulnerability by correcting how Windows validates file signatures.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.3986 | [KB4580346](https://patchblox.com/security/data/fix/microsoft/kb4580346.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3986 | [KB4580346](https://patchblox.com/security/data/fix/microsoft/kb4580346.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.2166 | [KB4580328](https://patchblox.com/security/data/fix/microsoft/kb4580328.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.2166 | [KB4580328](https://patchblox.com/security/data/fix/microsoft/kb4580328.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.2166 | [KB4580328](https://patchblox.com/security/data/fix/microsoft/kb4580328.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1792 | [KB4580330](https://patchblox.com/security/data/fix/microsoft/kb4580330.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1792 | [KB4580330](https://patchblox.com/security/data/fix/microsoft/kb4580330.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1792 | [KB4580330](https://patchblox.com/security/data/fix/microsoft/kb4580330.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1909 for 32-bit Systems |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1909 for ARM64-based Systems |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 1909 for x64-based Systems |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 2004 for 32-bit Systems | 19041.572 | [KB4579311](https://patchblox.com/security/data/fix/microsoft/kb4579311.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 2004 for ARM64-based Systems | 19041.572 | [KB4579311](https://patchblox.com/security/data/fix/microsoft/kb4579311.md) | Oct 13, 2020 |
| Microsoft | Windows 10 Version 2004 for x64-based Systems | 19041.572 | [KB4579311](https://patchblox.com/security/data/fix/microsoft/kb4579311.md) | Oct 13, 2020 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.18725 | [KB4580327](https://patchblox.com/security/data/fix/microsoft/kb4580327.md) | Oct 13, 2020 |
| Microsoft | Windows 10 for x64-based Systems | 10240.18725 | [KB4580327](https://patchblox.com/security/data/fix/microsoft/kb4580327.md) | Oct 13, 2020 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB4580345](https://patchblox.com/security/data/fix/microsoft/kb4580345.md) | Oct 13, 2020 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB4580387](https://patchblox.com/security/data/fix/microsoft/kb4580387.md) | Oct 13, 2020 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB4580345](https://patchblox.com/security/data/fix/microsoft/kb4580345.md) | Oct 13, 2020 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB4580387](https://patchblox.com/security/data/fix/microsoft/kb4580387.md) | Oct 13, 2020 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows RT 8.1 |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB4580345](https://patchblox.com/security/data/fix/microsoft/kb4580345.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB4580387](https://patchblox.com/security/data/fix/microsoft/kb4580387.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB4580345](https://patchblox.com/security/data/fix/microsoft/kb4580345.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB4580387](https://patchblox.com/security/data/fix/microsoft/kb4580387.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB4580378](https://patchblox.com/security/data/fix/microsoft/kb4580378.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB4580385](https://patchblox.com/security/data/fix/microsoft/kb4580385.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB4580378](https://patchblox.com/security/data/fix/microsoft/kb4580378.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB4580385](https://patchblox.com/security/data/fix/microsoft/kb4580385.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB4580378](https://patchblox.com/security/data/fix/microsoft/kb4580378.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB4580385](https://patchblox.com/security/data/fix/microsoft/kb4580385.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB4580378](https://patchblox.com/security/data/fix/microsoft/kb4580378.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB4580385](https://patchblox.com/security/data/fix/microsoft/kb4580385.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 |  | [KB4580382](https://patchblox.com/security/data/fix/microsoft/kb4580382.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 |  | [KB4580353](https://patchblox.com/security/data/fix/microsoft/kb4580353.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4580382](https://patchblox.com/security/data/fix/microsoft/kb4580382.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4580353](https://patchblox.com/security/data/fix/microsoft/kb4580353.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 |  | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2016 | 14393.3986 | [KB4580346](https://patchblox.com/security/data/fix/microsoft/kb4580346.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.3986 | [KB4580346](https://patchblox.com/security/data/fix/microsoft/kb4580346.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2019 | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows Server, version 1909 (Server Core installation) |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows Server, version 2004 (Server Core installation) | 19041.572 | [KB4579311](https://patchblox.com/security/data/fix/microsoft/kb4579311.md) | Oct 13, 2020 |

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