What is CVE-2019-4000?

CVE-2019-4000 is a high-severity vulnerability in Apple macOS, classified under Code Injection. CVSS score: 7.8/10. Published 2020-02-25.

How severe is CVE-2019-4000?

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

RCE in Apple macOS

CVE-2019-4000

Improper neutralization of directives in dynamically evaluated code in Druva inSync Mac OS Client 6.5.0 allows a local, authenticated attacker to execute arbitrary Python expressions with root privileges.

Vulnerability class: RCE (Remote Code Execution)

Published 2020-02-25 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Apple macOS
Druva Insync — versions 6.5.0
Druva Insync Mac OS Client — versions 6.5.0

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.tenable.com/security/research/tra-2020-12 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-4000?: CVE-2019-4000 is a high-severity vulnerability in Apple macOS, classified under Code Injection. CVSS score: 7.8/10. Published 2020-02-25.
How severe is CVE-2019-4000?: High severity. CVSS v3 base score is 7.8 out of 10.