CVE-2018-4443
Status: ModifiedHigh (8.8)—💥 Exploit
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2, Safari 12.0.2, iTunes 12.9.2 for Windows, iCloud for Windows 7.9.
CVSS
- Version: 3.0
- Vector: CVSS:3.0/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: 5.83%
- Percentile among all scored CVEs: 93
- Score date: 10/7/2026
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).
💥 Public exploits
Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
- Published on Exploit-DB · WebKit JSC - 'AbstractValue::set' Use-After-Free (1/2/2019)
Affected technologies (6)
CWEs
- CWE-119
References
- https://support.apple.com/kb/HT209340
- https://support.apple.com/kb/HT209342
- https://support.apple.com/kb/HT209343
- https://support.apple.com/kb/HT209344
- https://support.apple.com/kb/HT209345
- https://support.apple.com/kb/HT209346
- https://support.apple.com/kb/HT209340
- https://support.apple.com/kb/HT209342
- https://support.apple.com/kb/HT209343
- https://support.apple.com/kb/HT209344
- https://support.apple.com/kb/HT209345
- https://support.apple.com/kb/HT209346
Raw JSON (NVD)
Show
{
"id": "CVE-2018-4443",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"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"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 8.6,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": true
}
],
"cvssMetricV30": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:N/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": 2.8
}
]
},
"affected": [
{
"source": "product-security@apple.com",
"affectedData": [
{
"vendor": "n/a",
"product": "iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows",
"versions": [
{
"status": "affected",
"version": "Versions prior to: iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2, Safari 12.0.2, iTunes 12.9.2 for Windows, iCloud for Windows 7.9"
}
]
}
]
}
],
"published": "2019-04-03T18:29:16.610",
"references": [
{
"url": "https://support.apple.com/kb/HT209340",
"tags": [
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/kb/HT209342",
"tags": [
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/kb/HT209343",
"tags": [
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/kb/HT209344",
"tags": [
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/kb/HT209345",
"tags": [
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/kb/HT209346",
"tags": [
"Vendor Advisory"
],
"source": "product-security@apple.com"
},
{
"url": "https://support.apple.com/kb/HT209340",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://support.apple.com/kb/HT209342",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://support.apple.com/kb/HT209343",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://support.apple.com/kb/HT209344",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://support.apple.com/kb/HT209345",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://support.apple.com/kb/HT209346",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-119"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2, Safari 12.0.2, iTunes 12.9.2 for Windows, iCloud for Windows 7.9."
},
{
"lang": "es",
"value": "Un problema de corrupción de memoria se abordó con una gestión de memoria mejorada. El problema afectaba a iOS en versiones anteriores a la 12.1.1, tvOS en versiones anteriores a la 12.1.1, watchOS en versiones anteriores a la 5.1.2, Safari en versiones anteriores a la 12.0.2, iTunes en versiones anteriores a la 12.9.2 y iCloud para Windows en versiones anteriores a la 7.9."
}
],
"lastModified": "2026-06-17T01:58:59.547",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "822584EE-77D0-4DDC-B524-A6D3D63184D5",
"versionEndExcluding": "12.0.2"
},
{
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A79B50D1-F20E-4A84-B75F-D28519FD8266",
"versionEndExcluding": "12.1.1"
},
{
"criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4CB972B5-9DB6-431D-90C6-081FD1751676",
"versionEndExcluding": "12.1.1"
},
{
"criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "06F7BB21-66D5-4AD6-83B8-66CC8E7656AD",
"versionEndExcluding": "5.1.2"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9E9BC10A-A085-41FD-B7E4-10DABF6E7B6C",
"versionEndExcluding": "7.9"
},
{
"criteria": "cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F8E149ED-9F45-4532-8AF2-69B91E1331F5",
"versionEndExcluding": "12.9.2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "product-security@apple.com"
}