# CVE-2019-1397: Windows Hyper-V Remote Code Execution Vulnerability CVE-2019-1397 is fixed in 22 products on 1 platform, first by KB4525236, released November 12, 2019. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2019-1397 - Priority: Urgent - CVSS: 7.6 (Critical) - EPSS: 0.0489 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Nov 12, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1397 ## 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 | 14393.3326 | [KB4525236](https://patchblox.com/security/data/fix/microsoft/kb4525236.md) | Nov 12, 2019 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1508 | [KB4525241](https://patchblox.com/security/data/fix/microsoft/kb4525241.md) | Nov 12, 2019 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1130 | [KB4525237](https://patchblox.com/security/data/fix/microsoft/kb4525237.md) | Nov 12, 2019 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.864 | [KB4523205](https://patchblox.com/security/data/fix/microsoft/kb4523205.md) | Nov 12, 2019 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | | [KB4524570](https://patchblox.com/security/data/fix/microsoft/kb4524570.md) | Nov 12, 2019 | | Microsoft | Windows 10 for x64-based Systems | 10240.18395 | [KB4525232](https://patchblox.com/security/data/fix/microsoft/kb4525232.md) | Nov 12, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4525235](https://patchblox.com/security/data/fix/microsoft/kb4525235.md) | Nov 12, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4525233](https://patchblox.com/security/data/fix/microsoft/kb4525233.md) | Nov 12, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4525243](https://patchblox.com/security/data/fix/microsoft/kb4525243.md) | Nov 12, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4525250](https://patchblox.com/security/data/fix/microsoft/kb4525250.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4525235](https://patchblox.com/security/data/fix/microsoft/kb4525235.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4525233](https://patchblox.com/security/data/fix/microsoft/kb4525233.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4525235](https://patchblox.com/security/data/fix/microsoft/kb4525235.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4525233](https://patchblox.com/security/data/fix/microsoft/kb4525233.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4525234](https://patchblox.com/security/data/fix/microsoft/kb4525234.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4525239](https://patchblox.com/security/data/fix/microsoft/kb4525239.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4525234](https://patchblox.com/security/data/fix/microsoft/kb4525234.md) | Nov 12, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4525239](https://patchblox.com/security/data/fix/microsoft/kb4525239.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 | | [KB4525253](https://patchblox.com/security/data/fix/microsoft/kb4525253.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 | | [KB4525246](https://patchblox.com/security/data/fix/microsoft/kb4525246.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4525253](https://patchblox.com/security/data/fix/microsoft/kb4525253.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4525246](https://patchblox.com/security/data/fix/microsoft/kb4525246.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4525243](https://patchblox.com/security/data/fix/microsoft/kb4525243.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4525250](https://patchblox.com/security/data/fix/microsoft/kb4525250.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4525243](https://patchblox.com/security/data/fix/microsoft/kb4525243.md) | Nov 12, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4525250](https://patchblox.com/security/data/fix/microsoft/kb4525250.md) | Nov 12, 2019 | | Microsoft | Windows Server 2016 | 14393.3326 | [KB4525236](https://patchblox.com/security/data/fix/microsoft/kb4525236.md) | Nov 12, 2019 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.3326 | [KB4525236](https://patchblox.com/security/data/fix/microsoft/kb4525236.md) | Nov 12, 2019 | | Microsoft | Windows Server 2019 | 17763.864 | [KB4523205](https://patchblox.com/security/data/fix/microsoft/kb4523205.md) | Nov 12, 2019 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.864 | [KB4523205](https://patchblox.com/security/data/fix/microsoft/kb4523205.md) | Nov 12, 2019 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.1130 | [KB4525237](https://patchblox.com/security/data/fix/microsoft/kb4525237.md) | Nov 12, 2019 | | Microsoft | Windows Server, version 1903 (Server Core installation) | | [KB4524570](https://patchblox.com/security/data/fix/microsoft/kb4524570.md) | Nov 12, 2019 | --- Data as of 2026-11-07T18:46:35Z UTC. 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