# CVE-2018-8490: Windows Hyper-V Remote Code Execution Vulnerability CVE-2018-8490 is fixed in 12 products on 1 platform, first by KB4462917, released October 9, 2018. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2018-8490 - Priority: Urgent - CVSS: 7.6 (Critical) - EPSS: 0.0413 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Oct 9, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8490 ## Description

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.

An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.

The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1387 | [KB4462937](https://patchblox.com/security/data/fix/microsoft/kb4462937.md) | Oct 9, 2018 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.726 | [KB4462918](https://patchblox.com/security/data/fix/microsoft/kb4462918.md) | Oct 9, 2018 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.55 | [KB4464330](https://patchblox.com/security/data/fix/microsoft/kb4464330.md) | Oct 9, 2018 | | Microsoft | Windows 10 for x64-based Systems | 10240.18005 | [KB4462922](https://patchblox.com/security/data/fix/microsoft/kb4462922.md) | Oct 9, 2018 | | Microsoft | Windows Server 2016 | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 | | Microsoft | Windows Server 2019 | 17763.55 | [KB4464330](https://patchblox.com/security/data/fix/microsoft/kb4464330.md) | Oct 9, 2018 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.55 | [KB4464330](https://patchblox.com/security/data/fix/microsoft/kb4464330.md) | Oct 9, 2018 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.726 | [KB4462918](https://patchblox.com/security/data/fix/microsoft/kb4462918.md) | Oct 9, 2018 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 | --- Data as of 2026-11-07T12:40:37Z 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