What is CVE-2025-53949?

CVE-2025-53949 is a high-severity vulnerability in Fortinet Fortisandbox, classified under OS Command Injection. CVSS score: 7.0/10. Published 2025-12-09.

How severe is CVE-2025-53949?

High severity. CVSS v3 base score is 7.0 out of 10.

RCE in Fortinet Fortisandbox

CVE-2025-53949

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all version…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.002 (40.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:C.

Affected products

Fortinet Fortisandbox — versions 5.0.0, 4.4.0, 4.2.1

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-479

Frequently asked questions

What is CVE-2025-53949?: CVE-2025-53949 is a high-severity vulnerability in Fortinet Fortisandbox, classified under OS Command Injection. CVSS score: 7.0/10. Published 2025-12-09.
How severe is CVE-2025-53949?: High severity. CVSS v3 base score is 7.0 out of 10.