What is CVE-2020-3906?

CVE-2020-3906 is a high-severity vulnerability in Apple macOS. CVSS score: 7.8/10. Published 2020-04-01.

How severe is CVE-2020-3906?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Apple macOS

CVE-2020-3906

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Catalina 10.15.4. A maliciously crafted application may be able to bypass code signing enforcement.

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

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · 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-2020-3906?: CVE-2020-3906 is a high-severity vulnerability in Apple macOS. CVSS score: 7.8/10. Published 2020-04-01.
How severe is CVE-2020-3906?: High severity. CVSS v3 base score is 7.8 out of 10.