How severe is CVE-2020-15939?

CVE-2020-15939 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-15939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15939?

CVE-2020-15939 affects Fortinet Fortisandbox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15939?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-15939 published?

CVE-2020-15939 was published on 2021-09-06 and last updated on 2026-06-17.

CVE-2020-15939

CVE-2020-15939 is a medium-severity vulnerability in Fortinet Fortisandbox with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Fortinet Fortisandbox
Published: 2021-09-06
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-15939?: CVE-2020-15939 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-15939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15939?: CVE-2020-15939 affects Fortinet Fortisandbox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-15939 published?: CVE-2020-15939 was published on 2021-09-06 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-20-071

Affected products (1)

cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*

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