{
  "cveId": "CVE-2025-64667",
  "url": "https://patchblox.com/security/cve/CVE-2025-64667",
  "summary": "CVE-2025-64667 is fixed in 4 products on 1 platform, first by KB5071873, released December 9, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Microsoft Exchange Server Spoofing Vulnerability",
  "description": "\u003Cp\u003EUser interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.\u003C/p\u003E",
  "published": "2025-12-09T14:00:00Z",
  "severity": "Important",
  "cvss": 5.3,
  "cwe": "User Interface (UI) Misrepresentation of Critical Information",
  "epss": 0.00796,
  "epssPercentile": 0.56681,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Unlikely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64667",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server 2016 Cumulative Update 23",
      "fixedVersion": "",
      "fix": "KB5071873",
      "url": "https://patchblox.com/security/fix/microsoft/kb5071873",
      "released": "2025-12-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server 2019 Cumulative Update 14",
      "fixedVersion": "",
      "fix": "KB5071874",
      "url": "https://patchblox.com/security/fix/microsoft/kb5071874",
      "released": "2025-12-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server 2019 Cumulative Update 15",
      "fixedVersion": "",
      "fix": "KB5071875",
      "url": "https://patchblox.com/security/fix/microsoft/kb5071875",
      "released": "2025-12-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server Subscription Edition RTM",
      "fixedVersion": "",
      "fix": "KB5071876",
      "url": "https://patchblox.com/security/fix/microsoft/kb5071876",
      "released": "2025-12-09T14:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}