# CVE-2020-0751: Windows Hyper-V Denial of Service Vulnerability

CVE-2020-0751 is fixed in 4 products on 1 platform, first by KB4532693, released February 11, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-0751
- Priority: Routine
- CVSS: 6.0 (Important)
- EPSS: 0.0139
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Feb 11, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0751

## Description

<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.</p> <p>The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1903 for x64-based Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Windows 10 Version 1909 for x64-based Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Windows Server, version 1909 (Server Core installation) |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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