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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2022-05-24
EPSS: 66.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2016-08-25 · updated 2026-06-17
Weakness: CWE-787

Description

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

How to fix

Upgrade to a fixed version: Apple Iphone Os 9.3.5. Check the vendor advisory for mitigations.

References

http://lists.apple.com/archives/security-announce/2016/Aug/msg00000.html
http://www.securityfocus.com/bid/92653
http://www.securitytracker.com/id/1036694
https://blog.lookout.com/blog/2016/08/25/trident-pegasus/
https://support.apple.com/HT207107
https://www.exploit-db.com/exploits/44836/
https://www.youtube.com/watch?v=xkdPjbaLngE
http://lists.apple.com/archives/security-announce/2016/Aug/msg00000.html
http://www.securityfocus.com/bid/92653
http://www.securitytracker.com/id/1036694
https://blog.lookout.com/blog/2016/08/25/trident-pegasus/
https://support.apple.com/HT207107

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