CVE-2020-9947

Status: ModifiedHigh (8.8)—
A use after free issue was addressed with improved memory management. This issue is fixed in watchOS 7.0, iOS 14.0 and iPadOS 14.0, iTunes for Windows 12.10.9, iCloud for Windows 11.5, tvOS 14.0, Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base score: 8.8
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 1.80%
Percentile among all scored CVEs: 78
Score date: 10/5/2026
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 (7)

Apple — Icloud Apple — Ipados Apple — Iphone OS Apple — Itunes Apple — Safari Apple — Tvos Apple — Watchos
CWEs

CWE-416
References

Raw JSON (NVD)

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{
  "id": "CVE-2020-9947",
  "cveTags": [],
  "metrics": {
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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
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          "confidentialityImpact": "PARTIAL"
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        "obtainAllPrivilege": false,
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  "published": "2020-12-08T20:15:16.713",
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          "value": "CWE-416"
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      "value": "A use after free issue was addressed with improved memory management. This issue is fixed in watchOS 7.0, iOS 14.0 and iPadOS 14.0, iTunes for Windows 12.10.9, iCloud for Windows 11.5, tvOS 14.0, Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution."
    },
    {
      "lang": "es",
      "value": "Se abordó un problema de uso de la memoria previamente liberada con una administración de la memoria mejorada. Este problema se corrigió en watchOS versión 7.0, iOS versión 14.0 e iPadOS versión 14.0, iTunes para Windows versión 12.10.9, iCloud para Windows versión 11.5, tvOS versión 14.0, Safari versión 14.0. Un procesamiento de contenido web malicioso puede conllevar a una ejecución de código arbitraria"
    }
  ],
  "lastModified": "2026-06-17T03:28:51.513",
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