{
  "cveId": "CVE-2026-21260",
  "url": "https://patchblox.com/security/cve/CVE-2026-21260",
  "summary": "CVE-2026-21260 is fixed in 5 products on 1 platform, first by KB5002839, released February 10, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Microsoft Outlook Spoofing Vulnerability",
  "description": "\u003Cp\u003EExposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.\u003C/p\u003E",
  "published": "2026-02-10T08:00:00Z",
  "severity": "Important",
  "cvss": 7.5,
  "cwe": "Exposure of Sensitive Information to an Unauthorized Actor",
  "epss": 0.01499,
  "epssPercentile": 0.74431,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Unlikely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21260",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft Outlook 2016 (32-bit edition)",
      "fixedVersion": "",
      "fix": "KB5002839",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002839",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Outlook 2016 (64-bit edition)",
      "fixedVersion": "",
      "fix": "KB5002839",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002839",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Enterprise Server 2016",
      "fixedVersion": "",
      "fix": "KB5002840",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002840",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Enterprise Server 2016",
      "fixedVersion": "",
      "fix": "KB5002841",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002841",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Server 2019",
      "fixedVersion": "",
      "fix": "KB5002836",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002836",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Server 2019",
      "fixedVersion": "",
      "fix": "KB5002834",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002834",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Server Subscription Edition",
      "fixedVersion": "",
      "fix": "KB5002833",
      "url": "https://patchblox.com/security/fix/microsoft/kb5002833",
      "released": "2026-02-10T08:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}