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CVE-2018-4199

28
FAUCET Score

CVE-2018-4199 is a high-severity vulnerability in Apple's WebKit component, affecting iOS prior to 11.4, Safari prior to 11.1.1, iCloud for Windows prior to 7.5, iTunes for Windows prior to 12.7.5, and tvOS prior to 11.4. This flaw allows remote attackers to execute arbitrary code or cause a denial of service through a buffer overflow when a user visits a specially crafted website. With a CVSS score of 8.8, it presents a significant risk due to its network-based attack vector and low attack complexity, potentially leading to high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.1.1CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
< 11.4CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 11.4CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
< 7.5CPE matchmatch criteria
cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
< 12.7.5CPE 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
3.22%
Probability of exploitation in next 30 days
EPSS Percentile
86.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0322 is in the 86th 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

No media coverage found for this CVE.

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

security.gentoo.org / glsa/201808-04
Third Party Advisory
support.apple.com / HT208848
Vendor Advisory
support.apple.com / HT208850
Vendor Advisory
support.apple.com / HT208852
Vendor Advisory
support.apple.com / HT208853
Vendor Advisory
support.apple.com / HT208854
Vendor Advisory
usn.ubuntu.com / 3687-1
Third Party Advisory
securitytracker.com / id/1041029
Third Party AdvisoryVDB Entry