{
  "fix": "KB5103213",
  "url": "https://patchblox.com/security/fix/microsoft/kb5103213",
  "summary": "KB5103213, released June 9, 2026, fixes 11 CVEs in Microsoft Exchange Server 2019 Cumulative Update 15. None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "June 2026 security update",
  "released": "2026-06-09T07:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-55008, exploitation more likely",
  "supported": true,
  "cveCount": 11,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.19636,
  "maxCvss": 9.6,
  "vendorAdvisory": "https://support.microsoft.com/help/5103213",
  "appliesTo": [
    {
      "product": "Microsoft Exchange Server 2019 Cumulative Update 15",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-exchange-server-2019-cumulative-update-15",
      "fixedVersion": "",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-55008",
      "url": "https://patchblox.com/security/cve/CVE-2026-55008",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 9.6,
      "epss": 0.00863,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-55009",
      "url": "https://patchblox.com/security/cve/CVE-2026-55009",
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.02513,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-45504",
      "url": "https://patchblox.com/security/cve/CVE-2026-45504",
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0118,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-55005",
      "url": "https://patchblox.com/security/cve/CVE-2026-55005",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0101,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-45583",
      "url": "https://patchblox.com/security/cve/CVE-2026-45583",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.00522,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-45503",
      "url": "https://patchblox.com/security/cve/CVE-2026-45503",
      "title": "Microsoft Exchange Server Information Disclosure Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Information Disclosure",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00445,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-47631",
      "url": "https://patchblox.com/security/cve/CVE-2026-47631",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00353,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-55006",
      "url": "https://patchblox.com/security/cve/CVE-2026-55006",
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00298,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-45502",
      "url": "https://patchblox.com/security/cve/CVE-2026-45502",
      "title": "Microsoft Exchange Server Information Disclosure Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5,
      "epss": 0.19636,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-45501",
      "url": "https://patchblox.com/security/cve/CVE-2026-45501",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.5,
      "epss": 0.00402,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-45500",
      "url": "https://patchblox.com/security/cve/CVE-2026-45500",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.1,
      "epss": 0.00375,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}