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CVE-2020-9966

Status: ModifiedHigh (7.8)—

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOS 14.0 and iPadOS 14.0. An application may be able to execute arbitrary code with kernel privileges.

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)

Apple — IpadosApple — Iphone OSApple — MAC OS XApple — TvosApple — Watchos

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-9966",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 6.4,
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        "obtainAllPrivilege": false,
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          "attackVector": "LOCAL",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
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  "affected": [
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  "published": "2020-12-08T20:15:17.297",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
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      ]
    }
  ],
  "descriptions": [
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      "lang": "en",
      "value": "An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOS 14.0 and iPadOS 14.0. An application may be able to execute arbitrary code with kernel privileges."
    },
    {
      "lang": "es",
      "value": "Se abordó una lectura fuera de límites con una comprobación de entrada mejorada. Este problema se corrigió en macOS Big Sur versión 11.0.1, watchOS versión 7.0, tvOS versión 14.0, iOS versión 14.0 y iPadOS versión 14.0. Una aplicación puede ser capaz de ejecutar código arbitrario con privilegios de kernel"
    }
  ],
  "lastModified": "2026-06-17T03:28:53.513",
  "configurations": [
    {
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}