CVEs / CVE-2016-4657
CVE-2016-4657: Apple iOS Webkit Memory Corruption Vulnerability
- Known exploited in the CISA KEV catalog since 24 May 2022
- high 8.8 CVSS 3.1 (NVD)
- EPSS 66.7% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 24 May 2022 |
|---|---|
| Due date for US federal agencies | 14 Jun 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2016-4657 on NVD
- CVE-2016-4657 in the CISA KEV catalog
- http://lists.apple.com/archives/security-announce/2016/Aug/msg00000.html Broken Link, Mailing List, Vendor Advisory
- http://www.securityfocus.com/bid/92653 Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036694 Broken Link, Third Party Advisory, VDB Entry
- https://blog.lookout.com/blog/2016/08/25/trident-pegasus/ Broken Link
- https://support.apple.com/HT207107 Release Notes, Vendor Advisory
- https://www.exploit-db.com/exploits/44836/ Exploit, Third Party Advisory, VDB Entry
- https://www.youtube.com/watch?v=xkdPjbaLngE Exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4657 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.