What’s Vulnerable › Vulnerabilities

CVE-2018-4207

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-01-11 · updated 2026-06-17
• Weakness: CWE-20

Description

In iOS before 11.3, Safari before 11.1, iCloud for Windows before 7.4, tvOS before 11.3, watchOS before 4.3, iTunes before 12.7.4 for Windows, unexpected interaction causes an ASSERT failure. This issue was addressed with improved checks.

Affected products

• Apple iCloud for Windows: before 7.4 — fixed in 7.4
• Apple Iphone Os: before 11.3 — fixed in 11.3
• Apple iTunes for Windows: before 12.7.4 — fixed in 12.7.4
• Apple Safari: before 11.1 — fixed in 11.1
• Apple tvOS: before 11.3 — fixed in 11.3
• Apple watchOS: before 4.3 — fixed in 4.3
• Canonical Ubuntu Linux: 18.04
• Webkitgtk+: before 2.22.0 — fixed in 2.22.0

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 7.4; Apple Iphone Os 11.3; Apple iTunes for Windows 12.7.4; Apple Safari 11.1; Apple tvOS 11.3; Apple watchOS 4.3; Webkitgtk+ 2.22.0. Check the vendor advisory for mitigations.

References

• https://security.gentoo.org/glsa/201812-04
• https://support.apple.com/HT208693%2C
• https://support.apple.com/HT208694
• https://support.apple.com/HT208695%2C
• https://support.apple.com/HT208696%2C
• https://support.apple.com/HT208697%2C
• https://support.apple.com/HT208698%2C
• https://usn.ubuntu.com/3781-1/
• https://security.gentoo.org/glsa/201812-04
• https://support.apple.com/HT208693%2C
• https://support.apple.com/HT208694
• https://support.apple.com/HT208695%2C

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