CVE-2016-4657
HIGHCISA KEVEPSS 99th pctlDescription
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.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 99% of all known CVEs.
Apple iOS Webkit Memory Corruption Vulnerability
Apple iOS WebKit contains a memory corruption vulnerability that allows attackers to execute remote code or cause a denial-of-service (DoS) via a crafted web site. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Apply updates per vendor instructions.
Remediation due: 2022-06-14
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
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4657
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-21.