{
  "fix": "KB4601366",
  "url": "https://patchblox.com/security/fix/microsoft/kb4601366",
  "summary": "KB4601366, released February 9, 2021, fixes 12 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "February 2021 security update",
  "released": "2021-02-09T14:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2021-24086, exploitation more likely",
  "supported": false,
  "cveCount": 12,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.58961,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://support.microsoft.com/help/4601366",
  "appliesTo": [
    {
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2",
      "fixedVersion": "",
      "supported": false
    },
    {
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2-server-core-installation",
      "fixedVersion": "",
      "supported": false
    },
    {
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2",
      "fixedVersion": "",
      "supported": false
    },
    {
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2-server-core-installation",
      "fixedVersion": "",
      "supported": false
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-24086",
      "url": "https://patchblox.com/security/cve/CVE-2021-24086",
      "title": "Windows TCP/IP Denial of Service Vulnerability",
      "component": "Windows TCP/IP",
      "impact": "Denial of Service",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.58961,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24074",
      "url": "https://patchblox.com/security/cve/CVE-2021-24074",
      "title": "Windows TCP/IP Remote Code Execution Vulnerability",
      "component": "Windows TCP/IP",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9.8,
      "epss": 0.26157,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24094",
      "url": "https://patchblox.com/security/cve/CVE-2021-24094",
      "title": "Windows TCP/IP Remote Code Execution Vulnerability",
      "component": "Windows TCP/IP",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9.8,
      "epss": 0.22136,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24078",
      "url": "https://patchblox.com/security/cve/CVE-2021-24078",
      "title": "Windows DNS Server Remote Code Execution Vulnerability",
      "component": "Role: DNS Server",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9.8,
      "epss": 0.11893,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24077",
      "url": "https://patchblox.com/security/cve/CVE-2021-24077",
      "title": "Windows Fax Service Remote Code Execution Vulnerability",
      "component": "Role: Windows Fax Service",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9.8,
      "epss": 0.02874,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-1722",
      "url": "https://patchblox.com/security/cve/CVE-2021-1722",
      "title": "Windows Fax Service Remote Code Execution Vulnerability",
      "component": "Role: Windows Fax Service",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 8.1,
      "epss": 0.02439,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24088",
      "url": "https://patchblox.com/security/cve/CVE-2021-24088",
      "title": "Windows Local Spooler Remote Code Execution Vulnerability",
      "component": "Windows Print Spooler Components",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 8.8,
      "epss": 0.02432,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-1727",
      "url": "https://patchblox.com/security/cve/CVE-2021-1727",
      "title": "Windows Installer Elevation of Privilege Vulnerability",
      "component": "Windows Installer",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00756,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": true
    },
    {
      "cveId": "CVE-2021-1734",
      "url": "https://patchblox.com/security/cve/CVE-2021-1734",
      "title": "Windows Remote Procedure Call Information Disclosure Vulnerability",
      "component": "Windows Remote Procedure Call",
      "impact": "Information Disclosure",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.03811,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24103",
      "url": "https://patchblox.com/security/cve/CVE-2021-24103",
      "title": "Windows Event Tracing Elevation of Privilege Vulnerability",
      "component": "Windows Event Tracing",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00625,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24102",
      "url": "https://patchblox.com/security/cve/CVE-2021-24102",
      "title": "Windows Event Tracing Elevation of Privilege Vulnerability",
      "component": "Windows Event Tracing",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00546,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-24080",
      "url": "https://patchblox.com/security/cve/CVE-2021-24080",
      "title": "Windows Trust Verification API Denial of Service Vulnerability",
      "component": "Windows Trust Verification API",
      "impact": "Denial of Service",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 6.5,
      "epss": 0.03051,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}