{
  "cveId": "CVE-2021-43255",
  "url": "https://patchblox.com/security/cve/CVE-2021-43255",
  "summary": "CVE-2021-43255 is fixed in 5 products on 1 platform, first by KB5002101, released December 14, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Microsoft Office Trust Center Spoofing Vulnerability",
  "description": "",
  "published": "2021-12-14T14:00:00Z",
  "severity": "Important",
  "cvss": 5.5,
  "epss": 0.02085,
  "epssPercentile": 0.81698,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43255",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2013 RT Service Pack 1",
      "fixedVersion": "",
      "fix": "KB5002101",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002101",
      "released": "2021-12-14T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2013 Service Pack 1 (32-bit editions)",
      "fixedVersion": "",
      "fix": "KB5002101",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002101",
      "released": "2021-12-14T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2013 Service Pack 1 (64-bit editions)",
      "fixedVersion": "",
      "fix": "KB5002101",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002101",
      "released": "2021-12-14T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2016 (32-bit edition)",
      "fixedVersion": "",
      "fix": "KB4504745",
      "url": "https://patchblox.com/security/fix/microsoft/kb4504745",
      "released": "2021-12-14T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2016 (32-bit edition)",
      "fixedVersion": "",
      "fix": "KB5002033",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002033",
      "released": "2021-12-14T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2016 (64-bit edition)",
      "fixedVersion": "",
      "fix": "KB4504745",
      "url": "https://patchblox.com/security/fix/microsoft/kb4504745",
      "released": "2021-12-14T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Office 2016 (64-bit edition)",
      "fixedVersion": "",
      "fix": "KB5002033",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002033",
      "released": "2021-12-14T14:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}