{
  "fix": "KB5002904",
  "url": "https://patchblox.com/security/fix/microsoft/kb5002904",
  "summary": "KB5002904, released September 8, 2026, fixes 30 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "September 2026 security update",
  "released": "2026-09-08T07:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-81959, rated Critical",
  "supported": true,
  "cveCount": 30,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00859,
  "maxCvss": 8.8,
  "vendorAdvisory": "https://support.microsoft.com/help/5002904",
  "appliesTo": [
    {
      "product": "Microsoft Office 2016 (32-bit edition)",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-office-2016-32-bit-edition",
      "fixedVersion": "",
      "supported": true
    },
    {
      "product": "Microsoft Office 2016 (64-bit edition)",
      "productUrl": "https://patchblox.com/security/product/microsoft/microsoft-office-2016-64-bit-edition",
      "fixedVersion": "",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-81948",
      "url": "https://patchblox.com/security/cve/CVE-2026-81948",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81949",
      "url": "https://patchblox.com/security/cve/CVE-2026-81949",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81950",
      "url": "https://patchblox.com/security/cve/CVE-2026-81950",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81951",
      "url": "https://patchblox.com/security/cve/CVE-2026-81951",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81953",
      "url": "https://patchblox.com/security/cve/CVE-2026-81953",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81959",
      "url": "https://patchblox.com/security/cve/CVE-2026-81959",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-78518",
      "url": "https://patchblox.com/security/cve/CVE-2026-78518",
      "title": "Microsoft Office Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00859,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81386",
      "url": "https://patchblox.com/security/cve/CVE-2026-81386",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81388",
      "url": "https://patchblox.com/security/cve/CVE-2026-81388",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81396",
      "url": "https://patchblox.com/security/cve/CVE-2026-81396",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81397",
      "url": "https://patchblox.com/security/cve/CVE-2026-81397",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81398",
      "url": "https://patchblox.com/security/cve/CVE-2026-81398",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81947",
      "url": "https://patchblox.com/security/cve/CVE-2026-81947",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81954",
      "url": "https://patchblox.com/security/cve/CVE-2026-81954",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81956",
      "url": "https://patchblox.com/security/cve/CVE-2026-81956",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81957",
      "url": "https://patchblox.com/security/cve/CVE-2026-81957",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81960",
      "url": "https://patchblox.com/security/cve/CVE-2026-81960",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81389",
      "url": "https://patchblox.com/security/cve/CVE-2026-81389",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.00369,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81387",
      "url": "https://patchblox.com/security/cve/CVE-2026-81387",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00553,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81394",
      "url": "https://patchblox.com/security/cve/CVE-2026-81394",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00553,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81390",
      "url": "https://patchblox.com/security/cve/CVE-2026-81390",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81391",
      "url": "https://patchblox.com/security/cve/CVE-2026-81391",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81392",
      "url": "https://patchblox.com/security/cve/CVE-2026-81392",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81393",
      "url": "https://patchblox.com/security/cve/CVE-2026-81393",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81395",
      "url": "https://patchblox.com/security/cve/CVE-2026-81395",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81399",
      "url": "https://patchblox.com/security/cve/CVE-2026-81399",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81400",
      "url": "https://patchblox.com/security/cve/CVE-2026-81400",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81401",
      "url": "https://patchblox.com/security/cve/CVE-2026-81401",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-81958",
      "url": "https://patchblox.com/security/cve/CVE-2026-81958",
      "title": "Microsoft Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-85875",
      "url": "https://patchblox.com/security/cve/CVE-2026-85875",
      "title": "Microsoft Office Excel Information Disclosure Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}