# CVE-2020-1047: Windows Hyper-V Elevation of Privilege Vulnerability

CVE-2020-1047 is fixed in 11 products on 1 platform, first by KB4580328, released October 13, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1047
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0089
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 13, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1047

## Description

<p>An elevation of privilege vulnerability exists when Windows Hyper-V on a host server fails to properly handle objects in memory. An attacker who successfully exploited these vulnerabilities could gain elevated privileges on a target operating system.</p> <p>This vulnerability by itself does not allow arbitrary code to be run.  However, this vulnerability could be used in conjunction with one or more vulnerabilities (e.g. a remote code execution vulnerability and another elevation of privilege) that could take advantage of the elevated privileges when running.</p> <p>The update addresses the vulnerabilities by correcting how Windows Hyper-V handles objects in memory.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| 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 x64-based Systems | 17134.1792 | [KB4580330](https://patchblox.com/security/data/fix/microsoft/kb4580330.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 x64-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 x64-based Systems | 19041.572 | [KB4579311](https://patchblox.com/security/data/fix/microsoft/kb4579311.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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Data as of 2026-11-08T00:53:09Z 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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