# CVE-2017-8664: Windows Hyper-V Remote Code Execution Vulnerability

CVE-2017-8664 is fixed in 11 products on 1 platform, first by KB4034660, released August 8, 2017. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-8664
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0397
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 8, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-8664

## 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 1511 for x64-based Systems | 10586.1045 | [KB4034660](https://patchblox.com/security/data/fix/microsoft/kb4034660.md) | Aug 8, 2017 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.1593 | [KB4034658](https://patchblox.com/security/data/fix/microsoft/kb4034658.md) | Aug 8, 2017 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.540 | [KB4034674](https://patchblox.com/security/data/fix/microsoft/kb4034674.md) | Aug 8, 2017 |
| Microsoft | Windows 10 for x64-based Systems | 10240.17533 | [KB4034668](https://patchblox.com/security/data/fix/microsoft/kb4034668.md) | Aug 8, 2017 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4034672](https://patchblox.com/security/data/fix/microsoft/kb4034672.md) | Aug 8, 2017 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4034681](https://patchblox.com/security/data/fix/microsoft/kb4034681.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 |  | [KB4034666](https://patchblox.com/security/data/fix/microsoft/kb4034666.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 |  | [KB4034665](https://patchblox.com/security/data/fix/microsoft/kb4034665.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4034666](https://patchblox.com/security/data/fix/microsoft/kb4034666.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4034665](https://patchblox.com/security/data/fix/microsoft/kb4034665.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 R2 |  | [KB4034672](https://patchblox.com/security/data/fix/microsoft/kb4034672.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 R2 |  | [KB4034681](https://patchblox.com/security/data/fix/microsoft/kb4034681.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4034672](https://patchblox.com/security/data/fix/microsoft/kb4034672.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4034681](https://patchblox.com/security/data/fix/microsoft/kb4034681.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2016 | 14393.1593 | [KB4034658](https://patchblox.com/security/data/fix/microsoft/kb4034658.md) | Aug 8, 2017 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.1593 | [KB4034658](https://patchblox.com/security/data/fix/microsoft/kb4034658.md) | Aug 8, 2017 |

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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