CVE-2016-4657: Apple iOS Webkit Memory Corruption Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2022-05-24. EPSS: 66.8% chance of exploitation in the next 30 days.

WebKit in Apple iOS before 9.3.5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

Affected products

• Apple iPhone OS: before 9.3.5 (fixed in 9.3.5)

Published 2016-08-25. Last modified 2026-06-17.