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 c…

Published 10 y ago 2016-08-25 · modified 4 mo ago 2026-06-17 · JSON

CVSS

8.8

v3.1 · CNA

CISA KEV

Yes

added 2022-05-24

EPSS

66.8%

percentile 99%

Public exploits

Exploit-DB

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.

Known exploited (CISA KEV)

Added: 4 y ago 2022-05-24
Due date: 2022-06-14 (4 y ago)
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Vendor / product: Apple / iOS
CISA name: Apple iOS Webkit Memory Corruption Vulnerability

CISA SSVC assessment

Exploitation: Active — exploited in the wild
Automatable: no
Technical impact: total
Assessed: 21 mo ago 2025-01-29

Exploit prediction (EPSS)

66.79% probability of exploitation in the next 30 days, higher than 99% of all scored CVEs.

Exploits and detections

EDB-44836 WebKit - not_number defineProperties UAF (Metasploit) · remote · 2018-06-05
EDB-44213 Nintendo Switch - WebKit Code Execution (PoC) · dos · 2017-03-12

CVSS scores

Assigned by	Version	Score	Vector
CISA ADP	3.1	8.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
NVD	3.1	8.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
CNA	3.1	8.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
NVD	2.0	6.8	`AV:N/AC:M/Au:N/C:P/I:P/A:P`

Classification

Weakness

CWE-787 Out-of-bounds Write

References

blog.lookout.com /blog/2016/08/25/trident-pegasus/ · x_refsource_MISC, x_transferred
youtube.com /watch?v=xkdPjbaLngE · x_refsource_MISC, x_transferred
exploit-db.com /exploits/44836/ · exploit, x_refsource_EXPLOIT-DB, x_transferred
securityfocus.com /bid/92653 · vdb-entry, x_refsource_BID, x_transferred
support.apple.com /HT207107 · x_refsource_CONFIRM, x_transferred
lists.apple.com /archives/security-announce/2016/Aug/msg00000.html · vendor-advisory, x_refsource_APPLE, x_transferred
securitytracker.com /id/1036694 · vdb-entry, x_refsource_SECTRACK, x_transferred
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4657 · government-resource

Sources

CVE List: CVE-2016-4657
NVD: CVE-2016-4657

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary