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CVE-2016-4666

22
FAUCET Score

CVE-2016-4666 is a critical WebKit vulnerability affecting Apple iOS before 10.1, Safari before 10.0.1, and tvOS before 10.0.1, allowing remote attackers to execute arbitrary code or cause a denial of service through memory corruption via a crafted website. Rated 8.8 HIGH on CVSS, it has a low attack complexity and requires user interaction, but can lead to high confidentiality, integrity, and availability impacts. While there is no known public exploit code or active exploitation, it garnered some community discussion and media coverage at the time of its disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.1CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 10.0.1CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
< 10.0.1CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.85%
Probability of exploitation in next 30 days
EPSS Percentile
76.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 76th percentile among its peer group of 14,824 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

support.apple.com / HT207270
Vendor Advisory
support.apple.com / HT207271
Vendor Advisory
support.apple.com / HT207272
Vendor Advisory
securityfocus.com / bid/93851
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037087
Third Party AdvisoryVDB Entry