{
  "fix": "KB4103721",
  "url": "https://patchblox.com/security/fix/microsoft/kb4103721",
  "summary": "KB4103721, released May 8, 2018, fixes 39 CVEs across 13 products. 2 of them are being exploited (CVE-2018-8174); 2 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "May 2018 cumulative update for Windows 10 1803",
  "released": "2018-05-08T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2018-8174, exploited (CISA KEV, ransomware)",
  "supported": false,
  "cveCount": 39,
  "exploitedCveCount": 2,
  "kevCveCount": 2,
  "ransomwareCveCount": 1,
  "maxEpss": 0.88243,
  "maxCvss": 7.6,
  "vendorAdvisory": "https://support.microsoft.com/help/4103721",
  "appliesTo": [
    {
      "product": "Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/internet-explorer-11-on-windows-10-version-1803-for-32-bit-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/internet-explorer-11-on-windows-10-version-1803-for-x64-based-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-on-windows-10-version-1803-for-32-bit-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-on-windows-10-version-1803-for-x64-based-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 3.5 on Windows Server, version 1803  (Server Core Installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-on-windows-server-version-1803-server-core-installation",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-4.7.2-on-windows-10-version-1803-for-32-bit-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-4.7.2-on-windows-10-version-1803-for-x64-based-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 4.7.2 on Windows Server, version 1803  (Server Core Installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-4.7.2-on-windows-server-version-1803-server-core-installation",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1803-for-32-bit-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1803-for-x64-based-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1803-for-32-bit-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1803-for-x64-based-systems",
      "fixedVersion": "17134.48",
      "supported": false
    },
    {
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-version-1803-server-core-installation",
      "fixedVersion": "17134.48",
      "supported": false
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2018-8174",
      "url": "https://patchblox.com/security/cve/CVE-2018-8174",
      "title": "Windows VBScript Engine Remote Code Execution Vulnerability",
      "component": "Microsoft Windows",
      "impact": "Remote Code Execution",
      "priority": "Patch now",
      "severity": "Critical",
      "cvss": 7.5,
      "epss": 0.88243,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0824",
      "url": "https://patchblox.com/security/cve/CVE-2018-0824",
      "title": "Microsoft COM for Windows Remote Code Execution Vulnerability",
      "component": "Windows COM",
      "impact": "Remote Code Execution",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.73037,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0953",
      "url": "https://patchblox.com/security/cve/CVE-2018-0953",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "priority": "Urgent",
      "cvss": 4.2,
      "epss": 0.66313,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8139",
      "url": "https://patchblox.com/security/cve/CVE-2018-8139",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.66313,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0946",
      "url": "https://patchblox.com/security/cve/CVE-2018-0946",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.5113,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8133",
      "url": "https://patchblox.com/security/cve/CVE-2018-8133",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.50213,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0943",
      "url": "https://patchblox.com/security/cve/CVE-2018-0943",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15747,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0945",
      "url": "https://patchblox.com/security/cve/CVE-2018-0945",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15747,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8128",
      "url": "https://patchblox.com/security/cve/CVE-2018-8128",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15747,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8130",
      "url": "https://patchblox.com/security/cve/CVE-2018-8130",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15747,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8137",
      "url": "https://patchblox.com/security/cve/CVE-2018-8137",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15747,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8114",
      "url": "https://patchblox.com/security/cve/CVE-2018-8114",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.5,
      "epss": 0.15672,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8122",
      "url": "https://patchblox.com/security/cve/CVE-2018-8122",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.5,
      "epss": 0.15672,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0955",
      "url": "https://patchblox.com/security/cve/CVE-2018-0955",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Moderate",
      "cvss": 6.4,
      "epss": 0.15672,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0954",
      "url": "https://patchblox.com/security/cve/CVE-2018-0954",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15463,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-1022",
      "url": "https://patchblox.com/security/cve/CVE-2018-1022",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15463,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8178",
      "url": "https://patchblox.com/security/cve/CVE-2018-8178",
      "title": "Microsoft Browser Memory Corruption Vulnerability",
      "component": "Microsoft Browsers",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.15463,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8179",
      "url": "https://patchblox.com/security/cve/CVE-2018-8179",
      "title": "Microsoft Edge Memory Corruption Vulnerability",
      "component": "Microsoft Edge",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.2,
      "epss": 0.14,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0959",
      "url": "https://patchblox.com/security/cve/CVE-2018-0959",
      "title": "Windows Hyper-V Remote Code Execution Vulnerability",
      "component": "Windows Hyper-V",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.6,
      "epss": 0.09803,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-1025",
      "url": "https://patchblox.com/security/cve/CVE-2018-1025",
      "title": "Microsoft Browser Information Disclosure Vulnerability",
      "component": "Microsoft Browsers",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.3,
      "epss": 0.06076,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0961",
      "url": "https://patchblox.com/security/cve/CVE-2018-0961",
      "title": "Hyper-V vSMB Remote Code Execution Vulnerability",
      "component": "Windows Hyper-V",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.6,
      "epss": 0.03103,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8134",
      "url": "https://patchblox.com/security/cve/CVE-2018-8134",
      "title": "Windows Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.02929,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8127",
      "url": "https://patchblox.com/security/cve/CVE-2018-8127",
      "title": "Windows Kernel Information Disclosure Vulnerability",
      "component": "Windows Kernel",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.7,
      "epss": 0.02896,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8112",
      "url": "https://patchblox.com/security/cve/CVE-2018-8112",
      "title": "Microsoft Edge Security Feature Bypass Vulnerability",
      "component": "Microsoft Edge",
      "impact": "Security Feature Bypass",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 4.3,
      "epss": 0.02768,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8164",
      "url": "https://patchblox.com/security/cve/CVE-2018-8164",
      "title": "Win32k Elevation of Privilege Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.01457,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8165",
      "url": "https://patchblox.com/security/cve/CVE-2018-8165",
      "title": "DirectX Graphics Kernel Elevation of Privilege Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.01327,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8124",
      "url": "https://patchblox.com/security/cve/CVE-2018-8124",
      "title": "Win32k Elevation of Privilege Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.012,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8167",
      "url": "https://patchblox.com/security/cve/CVE-2018-8167",
      "title": "Windows Common Log File System Driver Elevation of Privilege Vulnerability",
      "component": "Common Log File System Driver",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.01016,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0886",
      "url": "https://patchblox.com/security/cve/CVE-2018-0886",
      "title": "CredSSP Remote Code Execution Vulnerability",
      "component": "Microsoft Windows",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.1,
      "epss": 0.8197,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8897",
      "url": "https://patchblox.com/security/cve/CVE-2018-8897",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.18485,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0765",
      "url": "https://patchblox.com/security/cve/CVE-2018-0765",
      "title": ".NET and .NET Core Denial of Service Vulnerability",
      "component": ".NET Framework",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "epss": 0.08125,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-1039",
      "url": "https://patchblox.com/security/cve/CVE-2018-1039",
      "title": ".NET Framework Device Guard Security Feature Bypass Vulnerability",
      "component": ".NET Framework",
      "impact": "Security Feature Bypass",
      "priority": "High",
      "severity": "Important",
      "epss": 0.01295,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8166",
      "url": "https://patchblox.com/security/cve/CVE-2018-8166",
      "title": "Win32k Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.01222,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8145",
      "url": "https://patchblox.com/security/cve/CVE-2018-8145",
      "title": "Scripting Engine Information Disclosure Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 4.3,
      "epss": 0.66639,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8136",
      "url": "https://patchblox.com/security/cve/CVE-2018-8136",
      "title": "Windows Remote Code Execution Vulnerability",
      "component": "Microsoft Windows",
      "impact": "Remote Code Execution",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.23013,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8126",
      "url": "https://patchblox.com/security/cve/CVE-2018-8126",
      "title": "Internet Explorer Security Feature Bypass Vulnerability",
      "component": "Internet Explorer",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.3,
      "epss": 0.055,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-0958",
      "url": "https://patchblox.com/security/cve/CVE-2018-0958",
      "title": "Windows Security Feature Bypass Vulnerability",
      "component": "Microsoft Windows",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.3,
      "epss": 0.01361,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8129",
      "url": "https://patchblox.com/security/cve/CVE-2018-8129",
      "title": "Windows Security Feature Bypass Vulnerability",
      "component": "Device Guard",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.3,
      "epss": 0.01361,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2018-8132",
      "url": "https://patchblox.com/security/cve/CVE-2018-8132",
      "title": "Windows Security Feature Bypass Vulnerability",
      "component": "Device Guard",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.3,
      "epss": 0.01361,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}