What is CVE-2018-4189?

CVE-2018-4189 is a critical-severity vulnerability in Apple Tv, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-01-11.

How severe is CVE-2018-4189?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Apple Tv

CVE-2018-4189

In iOS before 11.2.5, macOS High Sierra before 10.13.3, Security Update 2018-001 Sierra, and Security Update 2018-001 El Capitan, watchOS before 4.2.2, and tvOS before 11.2.5, 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 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Weakness classification (CWE)

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

References

support.apple.com/HT208462 (Vendor Advisory)
support.apple.com/HT208463 (Vendor Advisory)
support.apple.com/HT208464 (Vendor Advisory)
support.apple.com/HT208465 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4189?: CVE-2018-4189 is a critical-severity vulnerability in Apple Tv, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-01-11.
How severe is CVE-2018-4189?: Critical severity. CVSS v3 base score is 9.8 out of 10.