# CVE-2019-1471: Windows Hyper-V Remote Code Execution Vulnerability

CVE-2019-1471 is fixed in 9 products on 1 platform, first by KB4530717, released December 10, 2019. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2019-1471
- Priority: Urgent
- CVSS: 8.2 (Critical)
- EPSS: 0.0803
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Dec 10, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1471

## Description

<p>A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.</p> <p>An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.</p> <p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1184 | [KB4530717](https://patchblox.com/security/data/fix/microsoft/kb4530717.md) | Dec 10, 2019 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.914 | [KB4530715](https://patchblox.com/security/data/fix/microsoft/kb4530715.md) | Dec 10, 2019 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems |  | [KB4530684](https://patchblox.com/security/data/fix/microsoft/kb4530684.md) | Dec 10, 2019 |
| Microsoft | Windows 10 Version 1909 for x64-based Systems |  | [KB4530684](https://patchblox.com/security/data/fix/microsoft/kb4530684.md) | Dec 10, 2019 |
| Microsoft | Windows Server 2019 | 17763.914 | [KB4530715](https://patchblox.com/security/data/fix/microsoft/kb4530715.md) | Dec 10, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.914 | [KB4530715](https://patchblox.com/security/data/fix/microsoft/kb4530715.md) | Dec 10, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.1184 | [KB4530717](https://patchblox.com/security/data/fix/microsoft/kb4530717.md) | Dec 10, 2019 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4530684](https://patchblox.com/security/data/fix/microsoft/kb4530684.md) | Dec 10, 2019 |
| Microsoft | Windows Server, version 1909 (Server Core installation) |  | [KB4530684](https://patchblox.com/security/data/fix/microsoft/kb4530684.md) | Dec 10, 2019 |

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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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