What is CVE-2018-4404?

CVE-2018-4404 is a high-severity vulnerability in Apple Iphone OS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2019-01-11.

How severe is CVE-2018-4404?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2018-4404 known to be exploited?

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

Buffer overflow in Apple Iphone OS

CVE-2018-4404

In iOS before 11.4 and macOS High Sierra before 10.13.5, a memory corruption issue exists and was addressed with improved memory handling.

Vulnerability class: Buffer Overflow

Published 2019-01-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.139 (96.4th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.139 · newest: 0.139 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

rapid7/metasploit-framework

References

support.apple.com/HT208849 (Vendor Advisory)
www.exploit-db.com/exploits/45998/ (VDB Entry, Third Party Advisory, exploit)
support.apple.com/HT208848,

Frequently asked questions

What is CVE-2018-4404?: CVE-2018-4404 is a high-severity vulnerability in Apple Iphone OS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2019-01-11.
How severe is CVE-2018-4404?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2018-4404 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.