{
  "fix": "KB5121608",
  "url": "https://patchblox.com/security/fix/microsoft/kb5121608",
  "summary": "KB5121608, released September 8, 2026, fixes 9 CVEs in Microsoft Exchange Server Subscription Edition RTM. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "September 2026 security update",
  "released": "2026-09-08T07:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-69378, high severity",
  "supported": true,
  "cveCount": 9,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01174,
  "maxCvss": 9.3,
  "vendorAdvisory": "https://support.microsoft.com/help/5121608",
  "appliesTo": [
    {
      "product": "Microsoft Exchange Server Subscription Edition RTM",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-exchange-server-subscription-edition-rtm",
      "fixedVersion": "",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-69378",
      "url": "https://patchblox.com/security/cve/CVE-2026-69378",
      "title": "Microsoft Exchange Server Denial of Service Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.01174,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69355",
      "url": "https://patchblox.com/security/cve/CVE-2026-69355",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00913,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69641",
      "url": "https://patchblox.com/security/cve/CVE-2026-69641",
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 9.1,
      "epss": 0.00862,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69356",
      "url": "https://patchblox.com/security/cve/CVE-2026-69356",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "High",
      "severity": "Important",
      "cvss": 9.3,
      "epss": 0.00756,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-55007",
      "url": "https://patchblox.com/security/cve/CVE-2026-55007",
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00707,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69380",
      "url": "https://patchblox.com/security/cve/CVE-2026-69380",
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00689,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69361",
      "url": "https://patchblox.com/security/cve/CVE-2026-69361",
      "title": "Microsoft Exchange Server Spoofing Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Spoofing",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.5,
      "epss": 0.0084,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69375",
      "url": "https://patchblox.com/security/cve/CVE-2026-69375",
      "title": "Microsoft Exchange Server Tampering Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Tampering",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.5,
      "epss": 0.00644,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-69382",
      "url": "https://patchblox.com/security/cve/CVE-2026-69382",
      "title": "Microsoft Exchange Server Information Disclosure Vulnerability",
      "component": "Microsoft Exchange Server",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.9,
      "epss": 0.00471,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}