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CVE-2018-4306

42
FAUCET Score

CVE-2018-4306 is a critical use-after-free vulnerability in WebKit, affecting Apple products including iOS prior to version 12, tvOS prior to version 12, Safari prior to version 12, iTunes 12.9 for Windows, and iCloud for Windows 7.7. With a CVSS score of 8.8 (HIGH), it allows for remote code execution with high impact on confidentiality, integrity, and availability, typically requiring user interaction. While not listed in CISA's KEV catalog, an exploit (EDB-45482) exists on ExploitDB, and it has received notable community discussion and media coverage, indicating awareness of its potential. Despite its age, its high FAUCET Risk Score of 97/100 suggests continued relevance for systems that have not been updated.

Impacted Technologies

VendorProductVersion(s)CPE
< 12CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
< 12.0CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 12CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
< 7.7CPE matchmatch criteria
cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
< 12.9CPE matchmatch criteria
cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*

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
9.35%
Probability of exploitation in next 30 days
EPSS Percentile
94.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-45482 · Sep 25, 2018
This CVE's current EPSS score of 0.0935 is in the 95th percentile among its peer group of 14,875 CVEs.

Social Chatter

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 / kb/HT209106
Vendor Advisory
support.apple.com / kb/HT209107
Vendor Advisory
support.apple.com / kb/HT209109
Vendor Advisory
support.apple.com / kb/HT209140
Vendor Advisory
support.apple.com / kb/HT209141
Vendor Advisory