What’s Vulnerable › Vulnerabilities

CVE-2020-0661

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-11 · updated 2026-06-17
• Weakness: CWE-20

Description

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate input from a privileged user on a guest operating system, aka 'Windows Hyper-V Denial of Service Vulnerability'. This CVE ID is unique from CVE-2020-0751.

Affected products

• Microsoft Windows 10 Version 1607: 1607, 1809, 1909
• Microsoft Windows Server 2016: 1903, 1909
• Microsoft Windows Server 2019: all versions
• Microsoft Corporation Windows: 10 Version 1809 for x64-based Systems, 10 Version 1607 for x64-based Systems
• Microsoft Windows 10 Version 1909 for x64-based Systems: all versions
• Microsoft Windows Server: 2019, 2019 (Core installation), 2016, 2016 (Core installation)
• Microsoft Windows Server, version 1903 (Server Core installation): all versions
• Microsoft Windows Server, version 1909 (Server Core installation): all versions

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0661
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0661

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