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CVE-2021-30838

Status: ModifiedHigh (7.8)—

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15 and iPadOS 15. A malicious application may be able to execute arbitrary code with system privileges on devices with an Apple Neural Engine.

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 (3)

Apple — IpadosApple — Iphone OSApple — Macos

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-30838",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "product-security@apple.com",
      "affectedData": [
        {
          "vendor": "Apple",
          "product": "iOS and iPadOS",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "15",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-19T14:15:09.317",
  "references": [
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      "url": "http://seclists.org/fulldisclosure/2021/Oct/61",
      "tags": [
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        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "product-security@apple.com"
    },
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      "url": "https://support.apple.com/en-us/HT212814",
      "tags": [
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        "Vendor Advisory"
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      "source": "product-security@apple.com"
    },
    {
      "url": "https://support.apple.com/kb/HT212804",
      "tags": [
        "Vendor Advisory"
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      "source": "product-security@apple.com"
    },
    {
      "url": "https://support.apple.com/kb/HT212807",
      "tags": [
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      "source": "product-security@apple.com"
    },
    {
      "url": "http://seclists.org/fulldisclosure/2021/Oct/61",
      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://support.apple.com/kb/HT212807",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15 and iPadOS 15. A malicious application may be able to execute arbitrary code with system privileges on devices with an Apple Neural Engine."
    },
    {
      "lang": "es",
      "value": "Se abordó un problema de corrupción de memoria con un manejo de memoria mejorado. Este problema es corregido en iOS versión 15 y iPadOS versión 15. Una aplicación maliciosa puede ser capaz de ejecutar código arbitrario con privilegios del sistema en dispositivos con un motor neuronal de Apple"
    }
  ],
  "lastModified": "2026-06-17T03:50:58.997",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FCD67B72-0B1D-46A8-A149-8149ED749FEC",
              "versionEndExcluding": "14.8"
            },
            {
              "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "56F86481-D995-43D7-982F-5DC6E4682A65",
              "versionEndExcluding": "14.8"
            },
            {
              "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1C416CDE-C6B5-4F68-8095-A4657F64C370",
              "versionEndExcluding": "11.6",
              "versionStartIncluding": "11.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "product-security@apple.com"
}