What’s Vulnerable › Vulnerabilities

CVE-2018-4409

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% 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-400

Description

A resource exhaustion issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, 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

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. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2018-4409 or the next vulnerability affects your stack