{
  "fix": "KB5002824",
  "url": "https://patchblox.com/security/fix/microsoft/kb5002824",
  "summary": "KB5002824, released January 13, 2026, fixes 3 CVEs in Office Online Server. None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "January 2026 security update",
  "released": "2026-01-13T08:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-20955, rated Critical",
  "supported": true,
  "cveCount": 3,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00615,
  "maxCvss": 7.8,
  "vendorAdvisory": "https://support.microsoft.com/help/5002824",
  "appliesTo": [
    {
      "product": "Office Online Server",
      "productUrl": "https://patchblox.com/security/product/microsoft/office-online-server",
      "fixedVersion": "",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-20955",
      "url": "https://patchblox.com/security/cve/CVE-2026-20955",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00615,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-20957",
      "url": "https://patchblox.com/security/cve/CVE-2026-20957",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 7.8,
      "epss": 0.00511,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-20950",
      "url": "https://patchblox.com/security/cve/CVE-2026-20950",
      "title": "Microsoft Excel Remote Code Execution Vulnerability",
      "component": "Microsoft Office Excel",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00488,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}