{
  "cveId": "CVE-2019-1166",
  "url": "https://patchblox.com/security/cve/CVE-2019-1166",
  "summary": "CVE-2019-1166 is fixed in 41 products on 1 platform, first by KB4519998, released October 8, 2019. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Windows NTLM Tampering Vulnerability",
  "description": "\u003Cp\u003EA tampering vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLM MIC (Message Integrity Check) protection. An attacker who successfully exploited this vulnerability could gain the ability to downgrade NTLM security features.\u003C/p\u003E\n\u003Cp\u003ETo exploit this vulnerability, the attacker would need to tamper with the NTLM exchange. The attacker could then modify flags of the NTLM packet without invalidating the signature.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by hardening NTLM MIC protection on the server-side.\u003C/p\u003E",
  "published": "2019-10-08T12:00:00Z",
  "severity": "Important",
  "cvss": 5.9,
  "epss": 0.68108,
  "epssPercentile": 0.99332,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1166",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.3274",
      "fix": "KB4519998",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519998",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.3274",
      "fix": "KB4519998",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519998",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for 32-bit Systems",
      "fixedVersion": "15063.2108",
      "fix": "KB4520010",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520010",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for x64-based Systems",
      "fixedVersion": "15063.2108",
      "fix": "KB4520010",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520010",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.1451",
      "fix": "KB4520004",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520004",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for ARM64-based Systems",
      "fixedVersion": "16299.1451",
      "fix": "KB4520004",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520004",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.1451",
      "fix": "KB4520004",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520004",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.1069",
      "fix": "KB4520008",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520008",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for ARM64-based Systems",
      "fixedVersion": "17134.1069",
      "fix": "KB4520008",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520008",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.1069",
      "fix": "KB4520008",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520008",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.805",
      "fix": "KB4519338",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519338",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.805",
      "fix": "KB4519338",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519338",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.805",
      "fix": "KB4519338",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519338",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for 32-bit Systems",
      "fixedVersion": "18362.418",
      "fix": "KB4517389",
      "url": "https://patchblox.com/security/fix/microsoft/kb4517389",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for ARM64-based Systems",
      "fixedVersion": "18362.418",
      "fix": "KB4517389",
      "url": "https://patchblox.com/security/fix/microsoft/kb4517389",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for x64-based Systems",
      "fixedVersion": "18362.418",
      "fix": "KB4517389",
      "url": "https://patchblox.com/security/fix/microsoft/kb4517389",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.18368",
      "fix": "KB4520011",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520011",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.18368",
      "fix": "KB4520011",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520011",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 7 for 32-bit Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4519976",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519976",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 7 for 32-bit Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4520003",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520003",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 7 for x64-based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4519976",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519976",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 7 for x64-based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4520003",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520003",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for 32-bit systems",
      "fixedVersion": "",
      "fix": "KB4520005",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520005",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for 32-bit systems",
      "fixedVersion": "",
      "fix": "KB4519990",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519990",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for x64-based systems",
      "fixedVersion": "",
      "fix": "KB4520005",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520005",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for x64-based systems",
      "fixedVersion": "",
      "fix": "KB4519990",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519990",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows RT 8.1",
      "fixedVersion": "",
      "fix": "KB4520005",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520005",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4519976",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519976",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4520003",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520003",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4519976",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519976",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4520003",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520003",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4519976",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519976",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520003",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520003",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4520002",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520002",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4520009",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520009",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520002",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520002",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520009",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520009",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for Itanium-Based Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4520002",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520002",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for Itanium-Based Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4520009",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520009",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4520002",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520002",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4520009",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520009",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520002",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520002",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520009",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520009",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB4520007",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520007",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB4519985",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519985",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520007",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520007",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4519985",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519985",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB4520005",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520005",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB4519990",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519990",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4520005",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520005",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4519990",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519990",
      "released": "2019-10-08T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.3274",
      "fix": "KB4519998",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519998",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.3274",
      "fix": "KB4519998",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519998",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.805",
      "fix": "KB4519338",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519338",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.805",
      "fix": "KB4519338",
      "url": "https://patchblox.com/security/fix/microsoft/kb4519338",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.1069",
      "fix": "KB4520008",
      "url": "https://patchblox.com/security/fix/microsoft/kb4520008",
      "released": "2019-10-08T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "18362.418",
      "fix": "KB4517389",
      "url": "https://patchblox.com/security/fix/microsoft/kb4517389",
      "released": "2019-10-08T00:00:00Z"
    }
  ],
  "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"
  }
}