{
  "fix": "KB5037034",
  "url": "https://patchblox.com/security/fix/microsoft/kb5037034",
  "summary": "KB5037034, released April 9, 2024, fixes 1 CVE across 9 products. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "April 2024 security update",
  "released": "2024-04-09T12:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2024-21409, high severity",
  "supported": true,
  "cveCount": 1,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.02513,
  "maxCvss": 7.3,
  "vendorAdvisory": "https://support.microsoft.com/help/5037034",
  "appliesTo": [
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1809-for-32-bit-systems",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1809-for-arm64-based-systems",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1809-for-x64-based-systems",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-server-2019",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-server-2019-server-core-installation",
      "fixedVersion": "",
      "supported": false
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.8-on-windows-10-version-1809-for-32-bit-systems",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.8-on-windows-10-version-1809-for-x64-based-systems",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.8-on-windows-server-2019",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-.net-framework-3.5-and-4.8-on-windows-server-2019-server-core-installation",
      "fixedVersion": "",
      "supported": false
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2024-21409",
      "url": "https://patchblox.com/security/cve/CVE-2024-21409",
      "title": ".NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability",
      "component": ".NET and Visual Studio",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.3,
      "epss": 0.02513,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}