What is CVE-2020-15939?

CVE-2020-15939 is a medium-severity vulnerability in Fortinet Fortisandbox. CVSS score: 4.3/10. Published 2021-09-06.

How severe is CVE-2020-15939?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Fortinet Fortisandbox

CVE-2020-15939

An improper access control vulnerability (CWE-284) in FortiSandbox versions 3.2.1 and below and 3.1.4 and below may allow an authenticated, unprivileged attacker to download the device configuration file via the recovery URL.

Published 2021-09-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Fortinet Fortisandbox — versions FortiSandbox 3.2.1, 3.1.4
Fortinet Fortisandbox

References

fortiguard.com/advisory/FG-IR-20-071 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-15939?: CVE-2020-15939 is a medium-severity vulnerability in Fortinet Fortisandbox. CVSS score: 4.3/10. Published 2021-09-06.
How severe is CVE-2020-15939?: Medium severity. CVSS v3 base score is 4.3 out of 10.