What’s Vulnerable › Vulnerabilities

CVE-2016-4656: Apple iOS Memory Corruption Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-05-24
• EPSS: 23.6% 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

The kernel in Apple iOS before 9.3.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.

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/92652
• 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/
• http://lists.apple.com/archives/security-announce/2016/Aug/msg00000.html
• http://www.securityfocus.com/bid/92652
• 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/

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