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CVE-2018-4338

21
FAUCET Score

CVE-2018-4338 is an information disclosure vulnerability in macOS, affecting versions prior to macOS Mojave 10.14, caused by insufficient input sanitization. This medium-severity vulnerability (CVSS 5.5) requires user interaction (UI:R) and local access (AV:L) to exploit, potentially leading to high confidentiality impact (C:H) without affecting integrity or availability. While there is no evidence of active exploitation or public exploit code in Metasploit, Nuclei, or ExploitDB, a Reddit post details a Proof of Concept (PoC) for this now-patched flaw.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.14CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.44%
Probability of exploitation in next 30 days
EPSS Percentile
70.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0144 is in the 81st percentile among its peer group of 5,765 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

support.apple.com / kb/HT209139
Vendor Advisory