{
  "fix": "KB5030524",
  "url": "https://patchblox.com/security/fix/microsoft/kb5030524",
  "summary": "KB5030524, released September 12, 2023, fixes 11 CVEs across 3 products. None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "September 2023 security update",
  "released": "2023-09-12T12:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2023-36745, exploitation more likely",
  "supported": true,
  "cveCount": 11,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.76169,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://support.microsoft.com/help/5030524",
  "appliesTo": [
    {
      "product": "Microsoft Exchange Server 2016 Cumulative Update 23",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-exchange-server-2016-cumulative-update-23",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft Exchange Server 2019 Cumulative Update 12",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-exchange-server-2019-cumulative-update-12",
      "fixedVersion": "",
      "supported": false
    },
    {
      "product": "Microsoft Exchange Server 2019 Cumulative Update 13",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-exchange-server-2019-cumulative-update-13",
      "fixedVersion": "",
      "supported": false
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2023-36745",
      "url": "https://patchblox.com/security/cve/CVE-2023-36745",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 8,
      "epss": 0.76169,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-36744",
      "url": "https://patchblox.com/security/cve/CVE-2023-36744",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 8,
      "epss": 0.57112,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-36777",
      "url": "https://patchblox.com/security/cve/CVE-2023-36777",
      "title": "Microsoft Exchange Server Information Disclosure Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Information Disclosure",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 5.7,
      "epss": 0.52011,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-36756",
      "url": "https://patchblox.com/security/cve/CVE-2023-36756",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 8,
      "epss": 0.49192,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-35388",
      "url": "https://patchblox.com/security/cve/CVE-2023-35388",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 8,
      "epss": 0.06847,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-38182",
      "url": "https://patchblox.com/security/cve/CVE-2023-38182",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 8,
      "epss": 0.05918,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-36757",
      "url": "https://patchblox.com/security/cve/CVE-2023-36757",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "High",
      "severity": "Important",
      "cvss": 8,
      "epss": 0.3692,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-38181",
      "url": "https://patchblox.com/security/cve/CVE-2023-38181",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.10796,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-38185",
      "url": "https://patchblox.com/security/cve/CVE-2023-38185",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.02678,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-35368",
      "url": "https://patchblox.com/security/cve/CVE-2023-35368",
      "title": "Microsoft Exchange Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0249,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-21709",
      "url": "https://patchblox.com/security/cve/CVE-2023-21709",
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 9.8,
      "epss": 0.01983,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}