{
  "cveId": "CVE-2020-1118",
  "url": "https://patchblox.com/security/cve/CVE-2020-1118",
  "summary": "CVE-2020-1118 is fixed in 20 products on 1 platform, first by KB4556812, released May 12, 2020. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Microsoft Windows Transport Layer Security Denial of Service Vulnerability",
  "description": "\u003Cp\u003EA denial of service vulnerability exists in the Windows implementation of Transport Layer Security (TLS) when it improperly handles certain key exchanges. An attacker who successfully exploited the vulnerability could cause a target system to stop responding.\u003C/p\u003E\n\u003Cp\u003ETo exploit this vulnerability, a remote unauthenticated attacker could send a specially crafted request to a target system utilizing TLS 1.2 or lower, triggering the system to automatically reboot.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by changing the way TLS key exchange messages are validated.\u003C/p\u003E",
  "published": "2020-05-12T07:00:00Z",
  "severity": "Important",
  "cvss": 8.6,
  "epss": 0.15153,
  "epssPercentile": 0.96764,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1118",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.1868",
      "fix": "KB4556812",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556812",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for ARM64-based Systems",
      "fixedVersion": "16299.1868",
      "fix": "KB4556812",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556812",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.1868",
      "fix": "KB4556812",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556812",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.1488",
      "fix": "KB4556807",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556807",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for ARM64-based Systems",
      "fixedVersion": "17134.1488",
      "fix": "KB4556807",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556807",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.1488",
      "fix": "KB4556807",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556807",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.1217",
      "fix": "KB4551853",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551853",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.1217",
      "fix": "KB4551853",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551853",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.1217",
      "fix": "KB4551853",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551853",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.1217",
      "fix": "KB4551853",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551853",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.1217",
      "fix": "KB4551853",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551853",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.1488",
      "fix": "KB4556807",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556807",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1909 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4556799",
      "url": "https://patchblox.com/security/fix/microsoft/kb4556799",
      "released": "2020-05-12T00:00:00Z"
    }
  ],
  "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"
  }
}