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CVE-2016-3320

Status: ModifiedMedium (4.9)—

Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allow attackers to bypass the Secure Boot protection mechanism by leveraging (1) administrative or (2) physical access to install a crafted boot manager, aka "Secure Boot Security Feature Bypass."

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (5)

Fedoraproject — FedoraMicrosoft — Windows 10Microsoft — Windows 8.1Microsoft — Windows RT 8.1Microsoft — Windows Server 2012

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2016-3320",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.2
      }
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  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
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          "product": "n/a",
          "versions": [
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  "published": "2016-08-09T21:59:27.520",
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      "tags": [
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      "source": "secure@microsoft.com"
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      "source": "secure@microsoft.com"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-254"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allow attackers to bypass the Secure Boot protection mechanism by leveraging (1) administrative or (2) physical access to install a crafted boot manager, aka \"Secure Boot Security Feature Bypass.\""
    },
    {
      "lang": "es",
      "value": "Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 permiten a atacantes eludir el mecanismo de protección Secure Boot aprovechando el acceso (1) administrativo o (2) físico para instalar un gestor boot manipulado, también conocida como \"Secure Boot Security Feature Bypass\"."
    }
  ],
  "lastModified": "2026-06-17T00:45:29.370",
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}