{
  "cveId": "CVE-2017-11786",
  "url": "https://patchblox.com/security/cve/CVE-2017-11786",
  "summary": "CVE-2017-11786 is fixed in 4 products on 1 platform, first by KB4011179, released October 10, 2017. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Skype for Business Elevation of Privilege Vulnerability",
  "description": "\u003Cp\u003EAn elevation of privilege vulnerability exists when Skype for Business fails to properly handle specific authentication requests.\u003C/p\u003E\n\u003Cp\u003EAn authenticated attacker who successfully exploited this vulnerability could steal an authentication hash that can be reused elsewhere. The attacker could then take any action that the user had permissions for, causing possible outcomes that could vary between users.\u003C/p\u003E\n\u003Cp\u003ETo exploit the vulnerability, an attacker could invite a user to an instant message session while using a malicious profile image.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by correcting how Skype for Business handles authentication requests.\u003C/p\u003E",
  "published": "2017-10-10T07:00:00Z",
  "severity": "Important",
  "epss": 0.09392,
  "epssPercentile": 0.9543,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Unlikely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11786",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft Lync 2013 Service Pack 1 (32-bit)",
      "fixedVersion": "",
      "fix": "KB4011179",
      "url": "https://patchblox.com/security/fix/microsoft/kb4011179",
      "released": "2017-10-10T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Lync 2013 Service Pack 1 (64-bit)",
      "fixedVersion": "",
      "fix": "KB4011179",
      "url": "https://patchblox.com/security/fix/microsoft/kb4011179",
      "released": "2017-10-10T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Skype for Business 2016 (32-bit)",
      "fixedVersion": "",
      "fix": "KB4011159",
      "url": "https://patchblox.com/security/fix/microsoft/kb4011159",
      "released": "2017-10-10T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Skype for Business 2016 (64-bit)",
      "fixedVersion": "",
      "fix": "KB4011159",
      "url": "https://patchblox.com/security/fix/microsoft/kb4011159",
      "released": "2017-10-10T07:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}