{
  "fix": "KB5007206",
  "url": "https://patchblox.com/security/fix/microsoft/kb5007206",
  "summary": "KB5007206, released November 9, 2021, fixes 28 CVEs across 9 products. 3 of them are being exploited (CVE-2021-42287); 3 on CISA KEV. Patch Radar priority: Patch now.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "November 2021 cumulative update for Windows 10 1809",
  "released": "2021-11-09T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2021-42287, exploited (CISA KEV, ransomware)",
  "supported": true,
  "cveCount": 28,
  "exploitedCveCount": 3,
  "kevCveCount": 3,
  "ransomwareCveCount": 3,
  "maxEpss": 0.7717,
  "maxCvss": 9,
  "vendorAdvisory": "https://support.microsoft.com/help/5007206",
  "appliesTo": [
    {
      "product": "Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1809 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-chromium-based-in-ie-mode-on-windows-10-version-1809-for-32-bit-systems",
      "fixedVersion": "17763.2300",
      "supported": false
    },
    {
      "product": "Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1809 for ARM64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-chromium-based-in-ie-mode-on-windows-10-version-1809-for-arm64-based-systems",
      "fixedVersion": "17763.2300",
      "supported": false
    },
    {
      "product": "Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1809 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-chromium-based-in-ie-mode-on-windows-10-version-1809-for-x64-based-systems",
      "fixedVersion": "17763.2300",
      "supported": false
    },
    {
      "product": "Microsoft Edge (Chromium-based) in IE Mode on Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-edge-chromium-based-in-ie-mode-on-windows-server-2019",
      "fixedVersion": "17763.2300",
      "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": "17763.2300",
      "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": "17763.2300",
      "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": "17763.2300",
      "supported": true
    },
    {
      "product": "Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2019",
      "fixedVersion": "17763.2300",
      "supported": true
    },
    {
      "product": "Windows Server 2019 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2019-server-core-installation",
      "fixedVersion": "17763.2300",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-42287",
      "url": "https://patchblox.com/security/cve/CVE-2021-42287",
      "title": "Active Directory Domain Services Elevation of Privilege Vulnerability",
      "component": "Windows Active Directory",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.7717,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42278",
      "url": "https://patchblox.com/security/cve/CVE-2021-42278",
      "title": "Active Directory Domain Services Elevation of Privilege Vulnerability",
      "component": "Windows Active Directory",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.73297,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41379",
      "url": "https://patchblox.com/security/cve/CVE-2021-41379",
      "title": "Windows Installer Elevation of Privilege Vulnerability",
      "component": "Windows Installer",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.19452,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38666",
      "url": "https://patchblox.com/security/cve/CVE-2021-38666",
      "title": "Remote Desktop Client Remote Code Execution Vulnerability",
      "component": "Windows RDP",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 8.8,
      "epss": 0.15184,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41356",
      "url": "https://patchblox.com/security/cve/CVE-2021-41356",
      "title": "Windows Denial of Service Vulnerability",
      "component": "Microsoft Windows",
      "impact": "Denial of Service",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.03018,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42279",
      "url": "https://patchblox.com/security/cve/CVE-2021-42279",
      "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
      "component": "Windows Scripting",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 4.2,
      "epss": 0.02319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-26443",
      "url": "https://patchblox.com/security/cve/CVE-2021-26443",
      "title": "Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability",
      "component": "Windows Virtual Machine Bus",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9,
      "epss": 0.01696,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38665",
      "url": "https://patchblox.com/security/cve/CVE-2021-38665",
      "title": "Remote Desktop Protocol Client Information Disclosure Vulnerability",
      "component": "Windows RDP",
      "impact": "Information Disclosure",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.4,
      "epss": 0.07018,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42282",
      "url": "https://patchblox.com/security/cve/CVE-2021-42282",
      "title": "Active Directory Domain Services Elevation of Privilege Vulnerability",
      "component": "Windows Active Directory",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.04173,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42291",
      "url": "https://patchblox.com/security/cve/CVE-2021-42291",
      "title": "Active Directory Domain Services Elevation of Privilege Vulnerability",
      "component": "Windows Active Directory",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.04173,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42276",
      "url": "https://patchblox.com/security/cve/CVE-2021-42276",
      "title": "Microsoft Windows Media Foundation Remote Code Execution Vulnerability",
      "component": "Microsoft Windows Codecs Library",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.02489,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42275",
      "url": "https://patchblox.com/security/cve/CVE-2021-42275",
      "title": "Microsoft COM for Windows Remote Code Execution Vulnerability",
      "component": "Windows COM",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.02098,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41378",
      "url": "https://patchblox.com/security/cve/CVE-2021-41378",
      "title": "Windows NTFS Remote Code Execution Vulnerability",
      "component": "Windows NTFS",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.01565,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42285",
      "url": "https://patchblox.com/security/cve/CVE-2021-42285",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00551,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42283",
      "url": "https://patchblox.com/security/cve/CVE-2021-42283",
      "title": "NTFS Elevation of Privilege Vulnerability",
      "component": "Windows NTFS",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-36957",
      "url": "https://patchblox.com/security/cve/CVE-2021-36957",
      "title": "Windows Desktop Bridge Elevation of Privilege Vulnerability",
      "component": "Windows Desktop Bridge",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41366",
      "url": "https://patchblox.com/security/cve/CVE-2021-41366",
      "title": "Credential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerability",
      "component": "Windows Cred SSProvider Protocol",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41367",
      "url": "https://patchblox.com/security/cve/CVE-2021-41367",
      "title": "NTFS Elevation of Privilege Vulnerability",
      "component": "Windows NTFS",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41370",
      "url": "https://patchblox.com/security/cve/CVE-2021-41370",
      "title": "NTFS Elevation of Privilege Vulnerability",
      "component": "Windows NTFS",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41377",
      "url": "https://patchblox.com/security/cve/CVE-2021-41377",
      "title": "Windows Fast FAT File System Driver Elevation of Privilege Vulnerability",
      "component": "Windows Fast FAT Driver",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-41351",
      "url": "https://patchblox.com/security/cve/CVE-2021-41351",
      "title": "Microsoft Edge (Chrome based) Spoofing on IE Mode",
      "component": "Microsoft Edge (Chromium-based) in IE Mode",
      "impact": "Spoofing",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 4.3,
      "epss": 0.03911,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42284",
      "url": "https://patchblox.com/security/cve/CVE-2021-42284",
      "title": "Windows Hyper-V Denial of Service Vulnerability",
      "component": "Role: Windows Hyper-V",
      "impact": "Denial of Service",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.8,
      "epss": 0.0376,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38631",
      "url": "https://patchblox.com/security/cve/CVE-2021-38631",
      "title": "Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability",
      "component": "Windows RDP",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 4.4,
      "epss": 0.01879,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": true
    },
    {
      "cveId": "CVE-2021-41371",
      "url": "https://patchblox.com/security/cve/CVE-2021-41371",
      "title": "Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability",
      "component": "Windows RDP",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 4.4,
      "epss": 0.01649,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": true
    },
    {
      "cveId": "CVE-2021-42280",
      "url": "https://patchblox.com/security/cve/CVE-2021-42280",
      "title": "Windows Feedback Hub Elevation of Privilege Vulnerability",
      "component": "Windows Feedback Hub",
      "impact": "Elevation of Privilege",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00957,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42277",
      "url": "https://patchblox.com/security/cve/CVE-2021-42277",
      "title": "Diagnostics Hub Standard Collector Elevation of Privilege Vulnerability",
      "component": "Windows Diagnostic Hub",
      "impact": "Elevation of Privilege",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00867,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42288",
      "url": "https://patchblox.com/security/cve/CVE-2021-42288",
      "title": "Windows Hello Security Feature Bypass Vulnerability",
      "component": "Windows Hello",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.7,
      "epss": 0.00708,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-42274",
      "url": "https://patchblox.com/security/cve/CVE-2021-42274",
      "title": "Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability",
      "component": "Role: Windows Hyper-V",
      "impact": "Denial of Service",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.8,
      "epss": 0.0069,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}