What is CVE-2020-3889?

CVE-2020-3889 is a medium-severity vulnerability in Apple macOS. CVSS score: 5.5/10. Published 2020-04-01.

How severe is CVE-2020-3889?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Apple macOS

CVE-2020-3889

A logic issue was addressed with improved state management. This issue is fixed in macOS Catalina 10.15.4. A local user may be able to read arbitrary files.

Published 2020-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.5% 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 macOS — versions unspecified
Apple Mac OS X

References

support.apple.com/HT211100 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-3889?: CVE-2020-3889 is a medium-severity vulnerability in Apple macOS. CVSS score: 5.5/10. Published 2020-04-01.
How severe is CVE-2020-3889?: Medium severity. CVSS v3 base score is 5.5 out of 10.