CVE-2016-4607: Apple iCloud

Critical severity, CVSS 9.8. EPSS: 5% chance of exploitation in the next 30 days.

libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on Windows, tvOS before 9.2.2, and watchOS before 2.2.2 allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, a different vulnerability than CVE-2016-4608, CVE-2016-4609, CVE-2016-4610, and CVE-2016-4612.

Affected products

• Apple iCloud: before 5.2.1 (fixed in 5.2.1)
• Apple iPhone OS: before 9.3.3 (fixed in 9.3.3)
• Apple iTunes: before 12.4.2 (fixed in 12.4.2)
• Apple Mac OS X: before 10.11.6 (fixed in 10.11.6)
• Apple tvOS: before 9.2.2 (fixed in 9.2.2)
• Apple watchOS: before 2.2.2 (fixed in 2.2.2)
• Fedoraproject Fedora: version 30 only
• Xmlsoft Libxslt: before 1.1.29 (fixed in 1.1.29)

Published 2016-07-22. Last modified 2026-06-17.