CVE-2016-4656 kev in the critical feed json
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 (memor…
published 2016-08-25 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5642
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-05-24
- epss
- 23.6%
- EPSS 23.6% chance of exploitation in 30 days, percentile 97%
- public exploits
- 2
- Metasploit, Exploit-DB
Summary
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
- apple iphone_os 9.3.5
Timeline
- Found exploited as a 0-day (Project Zero)
- 0-day patched (Project Zero)
- First public exploit (Metasploit exploit/apple_ios/browser/webkit_trident)
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-06-14 (4 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Apple, iOS
- CISA name
- Apple iOS Memory Corruption Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Found
- 2016-08-15
- Patched
- 2016-08-25
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 21 mo ago
Exploit prediction
23.63% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Metasploit exploit/apple_ios/browser/webkit_trident WebKit not_number defineProperties UAF metasploit exploit, manual rank, 2016-08-25
- EDB-44836 WebKit - not_number defineProperties UAF (Metasploit) remote, 2018-06-05
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
exploit-db.com
/exploits/44836/
exploit, third-party-advisory, vdb-entry
-
lists.apple.com
/archives/security-announce/2016/Aug/msg00000.html
vendor-advisory, broken-link, mailing-list
-
support.apple.com
/HT207107
release-notes, vendor-advisory
-
blog.lookout.com
/blog/2016/08/25/trident-pegasus/
broken-link
-
securityfocus.com
/bid/92652
vdb-entry, broken-link, third-party-advisory
-
securitytracker.com
/id/1036694
vdb-entry, broken-link, third-party-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4656
government-resource, us-government-resource
Sources
- CVE List CVE-2016-4656
- NVD CVE-2016-4656
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.