What is CVE-2018-4238?

CVE-2018-4238 is a low-severity vulnerability in Apple Iphone OS, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 2.4/10. Published 2018-06-08.

How severe is CVE-2018-4238?

Low severity. CVSS v3 base score is 2.4 out of 10.

Is CVE-2018-4238 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apple Iphone OS

CVE-2018-4238

An issue was discovered in certain Apple products. iOS before 11.4 is affected. The issue involves the "Siri" component. It allows physically proximate attackers to bypass the lock-screen protection mechanism and enable Siri.

Published 2018-06-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.4 (Low). Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Apple Iphone OS

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

Public proof-of-concept exploits

References

www.securitytracker.com/id/1041031 (VDB Entry, Third Party Advisory, vdb-entry)
support.apple.com/HT208848 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4238?: CVE-2018-4238 is a low-severity vulnerability in Apple Iphone OS, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 2.4/10. Published 2018-06-08.
How severe is CVE-2018-4238?: Low severity. CVSS v3 base score is 2.4 out of 10.
Is CVE-2018-4238 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.