CVE-2016-4657

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.668 · 99 %ileexploit · functionalEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 6 exploits · functional

Likely / severe?

66.8% (99th) EPSS

CVSS 6.8 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2022-05-24remediate by 2022-06-14

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Apple iOS Webkit Memory Corruption Vulnerability

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

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-119US

exploits (6)

Public proof-of-concept and weaponised exploit code.

EDB-44836WebKit - not_number defineProperties UAF (Metasploit)functional · exploit_db
EDB-44213Nintendo Switch - WebKit Code Execution (PoC)PoC · exploit_db
exploit/apple_ios/browser/webkit_tridentWebKit not_number defineProperties UAFPoC · metasploit
Mimoja/CVE-2016-4657-NintendoSwitchCVE-2016-4657 for NintendoSwitch rwxPoC · poc_in_github
iDaN5x/SwitcherooExploiting CVE-2016-4657 to JailBreak the Nintendo SwitchPoC · poc_in_github
viai957/webkit-vulnerability CVE-2016-4657 web-kit vulnerability for ios 9.3, nintendo switch browser vulnerability PoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Apple Inc. iOS≤ 9.3.5fstec_bduRU
apple iphone os< 9.3.5nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2016-08-25modified 2026-06-17

related (16,124)

Related entries.

ID	severity	EPSS	exploitable	published
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An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.11 and iPadOS 18.7.11, iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1,…
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Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security…
CVE-2026-53362US	—OT critical	0.71% (53rd)	KEV	2026-07-04
In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branc…
CVE-2026-53266US	—OT critical	0.93% (61st)	KEV	2026-06-25
In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source addre…
CVE-2026-11645US	—OT critical	2.44% (84th)	KEV	2026-06-09
Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium…

+16119 more

references (17)

External citations — patches, advisories, analysis.

scry

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