What’s Vulnerable › Vulnerabilities

CVE-2018-4378

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-03 · updated 2026-06-17
• Weakness: CWE-119

Description

A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

Affected products

• Apple iCloud for Windows: before 7.8 — fixed in 7.8
• Apple Iphone Os: before 12.1 — fixed in 12.1
• Apple iTunes for Windows: before 12.9.1 — fixed in 12.9.1
• Apple Safari: before 12.0.1 — fixed in 12.0.1
• Apple tvOS: before 12.1 — fixed in 12.1
• Apple watchOS: before 5.1 — fixed in 5.1

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 7.8; Apple Iphone Os 12.1; Apple iTunes for Windows 12.9.1; Apple Safari 12.0.1; Apple tvOS 12.1; Apple watchOS 5.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/kb/HT209192
• https://support.apple.com/kb/HT209194
• https://support.apple.com/kb/HT209195
• https://support.apple.com/kb/HT209196
• https://support.apple.com/kb/HT209197
• https://support.apple.com/kb/HT209198
• https://support.apple.com/kb/HT209192
• https://support.apple.com/kb/HT209194
• https://support.apple.com/kb/HT209195
• https://support.apple.com/kb/HT209196
• https://support.apple.com/kb/HT209197
• https://support.apple.com/kb/HT209198

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