# CVE-2019-0551: Windows Hyper-V Remote Code Execution Vulnerability

CVE-2019-0551 is fixed in 19 products on 1 platform, first by KB4480961, released January 8, 2019. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2019-0551
- Priority: Urgent
- CVSS: 7.6 (Critical)
- EPSS: 0.0446
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jan 8, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0551

## 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 1607 for 32-bit Systems | 14393.2724 | [KB4480961](https://patchblox.com/security/data/fix/microsoft/kb4480961.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2724 | [KB4480961](https://patchblox.com/security/data/fix/microsoft/kb4480961.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1563 | [KB4480973](https://patchblox.com/security/data/fix/microsoft/kb4480973.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1563 | [KB4480973](https://patchblox.com/security/data/fix/microsoft/kb4480973.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.904 | [KB4480978](https://patchblox.com/security/data/fix/microsoft/kb4480978.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.904 | [KB4480978](https://patchblox.com/security/data/fix/microsoft/kb4480978.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.904 | [KB4480978](https://patchblox.com/security/data/fix/microsoft/kb4480978.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.523 | [KB4480966](https://patchblox.com/security/data/fix/microsoft/kb4480966.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.523 | [KB4480966](https://patchblox.com/security/data/fix/microsoft/kb4480966.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.523 | [KB4480966](https://patchblox.com/security/data/fix/microsoft/kb4480966.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.253 | [KB4480116](https://patchblox.com/security/data/fix/microsoft/kb4480116.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.253 | [KB4480116](https://patchblox.com/security/data/fix/microsoft/kb4480116.md) | Jan 8, 2019 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.253 | [KB4480116](https://patchblox.com/security/data/fix/microsoft/kb4480116.md) | Jan 8, 2019 |
| Microsoft | Windows Server 2016 | 14393.2724 | [KB4480961](https://patchblox.com/security/data/fix/microsoft/kb4480961.md) | Jan 8, 2019 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.2724 | [KB4480961](https://patchblox.com/security/data/fix/microsoft/kb4480961.md) | Jan 8, 2019 |
| Microsoft | Windows Server 2019 | 17763.253 | [KB4480116](https://patchblox.com/security/data/fix/microsoft/kb4480116.md) | Jan 8, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.253 | [KB4480116](https://patchblox.com/security/data/fix/microsoft/kb4480116.md) | Jan 8, 2019 |
| Microsoft | Windows Server, version 1709  (Server Core Installation) | 16299.904 | [KB4480978](https://patchblox.com/security/data/fix/microsoft/kb4480978.md) | Jan 8, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.523 | [KB4480966](https://patchblox.com/security/data/fix/microsoft/kb4480966.md) | Jan 8, 2019 |

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