{
  "cveId": "CVE-2016-3320",
  "url": "https://patchblox.com/security/cve/CVE-2016-3320",
  "summary": "CVE-2016-3320 is fixed in 11 products on 1 platform, first by KB3172729, released August 9, 2016. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Secure Boot Security Feature Bypass Vulnerability",
  "description": "\u003Cp\u003EA security feature bypass vulnerability exists when Windows Secure Boot improperly loads a boot manager that is affected by the vulnerability. An attacker who successfully exploited this vulnerability could disable code integrity checks, allowing test-signed executables and drivers to be loaded onto a target device. Furthermore, the attacker could bypass Secure Boot Integrity Validation for BitLocker and Device Encryption security features.\u003C/p\u003E\n\u003Cp\u003ETo exploit the vulnerability, an attacker who has gained administrative privileges or who has physical access to a target device could install an affected boot manager and then install a policy affected by the vulnerability onto a target device.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by blacklisting affected boot managers.\u003C/p\u003E",
  "published": "2016-08-09T07:00:00Z",
  "severity": "Important",
  "cvss": 6.6,
  "epss": 0.04873,
  "epssPercentile": 0.92091,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3320",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1511 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1511 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for 32-bit systems",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 8.1 for x64-based systems",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows RT 8.1",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB3172729",
      "url": "https://patchblox.com/security/fix/microsoft/kb3172729",
      "released": "2016-08-09T07:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T06:34:28Z"
}