{
  "cveId": "CVE-2020-0661",
  "url": "https://patchblox.com/security/cve/CVE-2020-0661",
  "summary": "CVE-2020-0661 is fixed in 9 products on 1 platform, first by KB4537764, released February 11, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Windows Hyper-V Denial of Service Vulnerability",
  "description": "\u003Cp\u003EA 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. 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 that causes a host machine to crash.\u003C/p\u003E\n\u003Cp\u003ETo 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.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by resolving a number of conditions where Hyper-V would fail to prevent a guest operating system from sending malicious requests.\u003C/p\u003E",
  "published": "2020-02-11T14:00:00Z",
  "severity": "Important",
  "cvss": 6.8,
  "epss": 0.01632,
  "epssPercentile": 0.764,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0661",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.3504",
      "fix": "KB4537764",
      "url": "https://patchblox.com/security/fix/microsoft/kb4537764",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.1039",
      "fix": "KB4532691",
      "url": "https://patchblox.com/security/fix/microsoft/kb4532691",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4532693",
      "url": "https://patchblox.com/security/fix/microsoft/kb4532693",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.3504",
      "fix": "KB4537764",
      "url": "https://patchblox.com/security/fix/microsoft/kb4537764",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.3504",
      "fix": "KB4537764",
      "url": "https://patchblox.com/security/fix/microsoft/kb4537764",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.1039",
      "fix": "KB4532691",
      "url": "https://patchblox.com/security/fix/microsoft/kb4532691",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.1039",
      "fix": "KB4532691",
      "url": "https://patchblox.com/security/fix/microsoft/kb4532691",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4532693",
      "url": "https://patchblox.com/security/fix/microsoft/kb4532693",
      "released": "2020-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1909 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4532693",
      "url": "https://patchblox.com/security/fix/microsoft/kb4532693",
      "released": "2020-02-11T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}