{
  "fix": "KB5003638",
  "url": "https://patchblox.com/security/fix/microsoft/kb5003638",
  "summary": "KB5003638, released June 8, 2021, fixes 19 CVEs across 4 products. 5 of them are being exploited (CVE-2021-1675); 5 on CISA KEV. Patch Radar priority: Patch now.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "June 2021 cumulative update for Windows 10 1607",
  "released": "2021-06-08T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2021-1675, exploited (CISA KEV, ransomware)",
  "supported": true,
  "cveCount": 19,
  "exploitedCveCount": 5,
  "kevCveCount": 5,
  "ransomwareCveCount": 1,
  "maxEpss": 0.85305,
  "maxCvss": 9.4,
  "vendorAdvisory": "https://support.microsoft.com/help/5003638",
  "appliesTo": [
    {
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1607-for-32-bit-systems",
      "fixedVersion": "14393.4467",
      "supported": true
    },
    {
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-10-version-1607-for-x64-based-systems",
      "fixedVersion": "14393.4467",
      "supported": true
    },
    {
      "product": "Windows Server 2016",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2016",
      "fixedVersion": "14393.4467",
      "supported": true
    },
    {
      "product": "Windows Server 2016 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2016-server-core-installation",
      "fixedVersion": "14393.4467",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-1675",
      "url": "https://patchblox.com/security/cve/CVE-2021-1675",
      "title": "Windows Print Spooler Remote Code Execution Vulnerability",
      "component": "Windows Print Spooler Components",
      "impact": "Remote Code Execution",
      "priority": "Patch now",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.85305,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-33742",
      "url": "https://patchblox.com/security/cve/CVE-2021-33742",
      "title": "Windows MSHTML Platform Remote Code Execution Vulnerability",
      "component": "Windows MSHTML Platform",
      "impact": "Remote Code Execution",
      "priority": "Patch now",
      "severity": "Critical",
      "cvss": 7.5,
      "epss": 0.59407,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31956",
      "url": "https://patchblox.com/security/cve/CVE-2021-31956",
      "title": "Windows NTFS Elevation of Privilege Vulnerability",
      "component": "Windows NTFS",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.22273,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31199",
      "url": "https://patchblox.com/security/cve/CVE-2021-31199",
      "title": "Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability",
      "component": "Windows Cryptographic Services",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 5.2,
      "epss": 0.02979,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31201",
      "url": "https://patchblox.com/security/cve/CVE-2021-31201",
      "title": "Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability",
      "component": "Windows Cryptographic Services",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 5.2,
      "epss": 0.02617,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31959",
      "url": "https://patchblox.com/security/cve/CVE-2021-31959",
      "title": "Scripting Engine Memory Corruption Vulnerability",
      "component": "Microsoft Scripting Engine",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 6.4,
      "epss": 0.0923,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31954",
      "url": "https://patchblox.com/security/cve/CVE-2021-31954",
      "title": "Windows Common Log File System Driver Elevation of Privilege Vulnerability",
      "component": "Windows Common Log File System Driver",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.01065,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31974",
      "url": "https://patchblox.com/security/cve/CVE-2021-31974",
      "title": "Server for NFS Denial of Service Vulnerability",
      "component": "Windows Network File System",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.06733,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31962",
      "url": "https://patchblox.com/security/cve/CVE-2021-31962",
      "title": "Kerberos AppContainer Security Feature Bypass Vulnerability",
      "component": "Windows Kerberos",
      "impact": "Security Feature Bypass",
      "priority": "High",
      "severity": "Important",
      "cvss": 9.4,
      "epss": 0.03808,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31975",
      "url": "https://patchblox.com/security/cve/CVE-2021-31975",
      "title": "Server for NFS Information Disclosure Vulnerability",
      "component": "Windows Network File System",
      "impact": "Information Disclosure",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.03659,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31976",
      "url": "https://patchblox.com/security/cve/CVE-2021-31976",
      "title": "Server for NFS Information Disclosure Vulnerability",
      "component": "Windows Network File System",
      "impact": "Information Disclosure",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.03659,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31977",
      "url": "https://patchblox.com/security/cve/CVE-2021-31977",
      "title": "Windows Hyper-V Denial of Service Vulnerability",
      "component": "Role: Windows Hyper-V",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.6,
      "epss": 0.03179,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31968",
      "url": "https://patchblox.com/security/cve/CVE-2021-31968",
      "title": "Windows Remote Desktop Services\u00A0Denial of Service Vulnerability",
      "component": "Windows Remote Desktop",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.03179,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": true
    },
    {
      "cveId": "CVE-2021-31958",
      "url": "https://patchblox.com/security/cve/CVE-2021-31958",
      "title": "Windows NTLM Elevation of Privilege Vulnerability",
      "component": "Windows NTLM",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.02555,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31953",
      "url": "https://patchblox.com/security/cve/CVE-2021-31953",
      "title": "Windows Filter Manager Elevation of Privilege Vulnerability",
      "component": "Windows Filter Manager",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0055,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31973",
      "url": "https://patchblox.com/security/cve/CVE-2021-31973",
      "title": "Windows GPSVC Elevation of Privilege Vulnerability",
      "component": "Windows Installer",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.0055,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31971",
      "url": "https://patchblox.com/security/cve/CVE-2021-31971",
      "title": "Windows HTML Platforms Security Feature Bypass Vulnerability",
      "component": "Windows HTML Platform",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.8,
      "epss": 0.02091,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31970",
      "url": "https://patchblox.com/security/cve/CVE-2021-31970",
      "title": "Windows TCP/IP Driver Security Feature Bypass Vulnerability",
      "component": "Windows TCP/IP",
      "impact": "Security Feature Bypass",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00859,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-31972",
      "url": "https://patchblox.com/security/cve/CVE-2021-31972",
      "title": "Event Tracing for Windows Information Disclosure Vulnerability",
      "component": "Windows Event Logging Service",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.0076,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}