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CVE-2018-4404

52
FAUCET Score

CVE-2018-4404 is a critical memory corruption vulnerability affecting Apple iOS before version 11.4 and macOS High Sierra before 10.13.5, stemming from inadequate memory handling. This high-severity flaw (CVSS 7.8) can be triggered locally with user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV, exploit intelligence indicates the availability of a Metasploit module (Safari Proxy Object Type Confusion), and it has garnered significant community discussion and media coverage, including its association with the "LightSpy" spyware.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.4CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
>= 10.13.0, < 10.13.5CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
13.92%
Probability of exploitation in next 30 days
EPSS Percentile
96.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Safari Proxy Object Type Confusion · Mar 15, 2018
ExploitDB: EDB-45998 · Dec 14, 2018
This CVE's current EPSS score of 0.1392 is in the 96th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 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 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

support.apple.com / HT208848%2C
support.apple.com / HT208849
Vendor Advisory
exploit-db.com / exploits/45998
Third Party AdvisoryVDB Entry