{
  "fix": "KB4471332",
  "url": "https://patchblox.com/security/fix/microsoft/kb4471332",
  "summary": "KB4471332, released December 11, 2018, fixes 23 CVEs across 13 products. 2 of them are being exploited (CVE-2018-8639); 2 on CISA KEV. Patch Radar priority: Patch now.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "December 2018 cumulative update for Windows 10 1809",
  "released": "2018-12-11T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2018-8639, exploited (CISA KEV, ransomware)",
  "supported": true,
  "cveCount": 23,
  "exploitedCveCount": 2,
  "kevCveCount": 2,
  "ransomwareCveCount": 1,
  "maxEpss": 0.68493,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://support.microsoft.com/help/4471332",
  "appliesTo": [
    {
      "product": "Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/internet-explorer-11-on-windows-10-version-1809-for-32-bit-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/internet-explorer-11-on-windows-10-version-1809-for-arm64-based-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/internet-explorer-11-on-windows-10-version-1809-for-x64-based-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Internet Explorer 11 on Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/internet-explorer-11-on-windows-server-2019",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1809-for-32-bit-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1809-for-arm64-based-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1809-for-x64-based-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Microsoft Edge (EdgeHTML-based) on Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-edgehtml-based-on-windows-server-2019",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1809-for-32-bit-systems",
      "fixedVersion": "17763.194",
      "supported": true
    },
    {
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1809-for-arm64-based-systems",
      "fixedVersion": "17763.194",
      "supported": false
    },
    {
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1809-for-x64-based-systems",
      "fixedVersion": "17763.194",
      "supported": true
    },
    {
      "product": "Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2019",
      "fixedVersion": "17763.194",
      "supported": true
    },
    {
      "product": "Windows Server 2019 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2019-server-core-installation",
      "fixedVersion": "17763.194",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2018-8639",
      "url": "https://patchblox.com/security/cve/CVE-2018-8639",
      "title": "Win32k Elevation of Privilege Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Information Disclosure",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.22349,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8611",
      "url": "https://patchblox.com/security/cve/CVE-2018-8611",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.04196,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8631",
      "url": "https://patchblox.com/security/cve/CVE-2018-8631",
      "title": "Internet Explorer Memory Corruption Vulnerability",
      "component": "Internet Explorer",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Moderate",
      "cvss": 6.4,
      "epss": 0.68493,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8617",
      "url": "https://patchblox.com/security/cve/CVE-2018-8617",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.62483,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8619",
      "url": "https://patchblox.com/security/cve/CVE-2018-8619",
      "title": "Internet Explorer Remote Code Execution Vulnerability",
      "component": "Internet Explorer",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 6.4,
      "epss": 0.44844,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8625",
      "url": "https://patchblox.com/security/cve/CVE-2018-8625",
      "title": "Windows VBScript Engine Remote Code Execution Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 6.4,
      "epss": 0.43761,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8629",
      "url": "https://patchblox.com/security/cve/CVE-2018-8629",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.22599,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8626",
      "url": "https://patchblox.com/security/cve/CVE-2018-8626",
      "title": "Windows DNS Server Heap Overflow Vulnerability",
      "component": "Microsoft Windows DNS",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9.8,
      "epss": 0.21241,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8634",
      "url": "https://patchblox.com/security/cve/CVE-2018-8634",
      "title": "Microsoft Text-To-Speech Remote Code Execution Vulnerability",
      "component": "Windows Authentication Methods",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15355,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8624",
      "url": "https://patchblox.com/security/cve/CVE-2018-8624",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.13207,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8583",
      "url": "https://patchblox.com/security/cve/CVE-2018-8583",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.10886,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8618",
      "url": "https://patchblox.com/security/cve/CVE-2018-8618",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.10886,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8643",
      "url": "https://patchblox.com/security/cve/CVE-2018-8643",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 6.4,
      "epss": 0.09906,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8596",
      "url": "https://patchblox.com/security/cve/CVE-2018-8596",
      "title": "Windows GDI Information Disclosure Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.7,
      "epss": 0.07073,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8595",
      "url": "https://patchblox.com/security/cve/CVE-2018-8595",
      "title": "Windows GDI Information Disclosure Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.7,
      "epss": 0.06923,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8637",
      "url": "https://patchblox.com/security/cve/CVE-2018-8637",
      "title": "Win32k Information Disclosure Vulnerability",
      "component": "Windows Kernel",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.7,
      "epss": 0.01849,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8638",
      "url": "https://patchblox.com/security/cve/CVE-2018-8638",
      "title": "DirectX Information Disclosure Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.7,
      "epss": 0.01819,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8477",
      "url": "https://patchblox.com/security/cve/CVE-2018-8477",
      "title": "Windows Kernel Information Disclosure Vulnerability",
      "component": "Windows Kernel",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 3.3,
      "epss": 0.01796,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8612",
      "url": "https://patchblox.com/security/cve/CVE-2018-8612",
      "title": "Connected User Experiences and Telemetry Service Denial of Service Vulnerability",
      "component": "Windows Kernel",
      "impact": "Denial of Service",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.7,
      "epss": 0.01424,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8641",
      "url": "https://patchblox.com/security/cve/CVE-2018-8641",
      "title": "Win32k Elevation of Privilege Vulnerability",
      "component": "Windows Kernel-Mode Drivers",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.01116,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8599",
      "url": "https://patchblox.com/security/cve/CVE-2018-8599",
      "title": "Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability",
      "component": "Visual Studio",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.00998,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8514",
      "url": "https://patchblox.com/security/cve/CVE-2018-8514",
      "title": "Windows Remote Procedure Call Information Disclosure Vulnerability",
      "component": "Microsoft Windows DNS",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 3.3,
      "epss": 0.01889,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8649",
      "url": "https://patchblox.com/security/cve/CVE-2018-8649",
      "title": "Windows Denial of Service Vulnerability",
      "component": "Microsoft Windows",
      "impact": "Denial of Service",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5,
      "epss": 0.01666,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}