What is CVE-2025-53949?

CVE-2025-53949 is a high-severity vulnerability in Fortinet Fortisandbox, classified under OS Command Injection. CVSS score: 7.2/10. Published 2025-12-09.

How severe is CVE-2025-53949?

High severity. CVSS v3 base score is 7.2 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 versions, FortiSandbox 4.0 all versions may allow an authenticated attacker to execute unauthorized code on the underlying system via crafted HTTP requests.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.158 (96.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortisandbox — versions 5.0.0, 4.4.0, 4.2.1

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

psirt@fortinet.com (Vendor Advisory)

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: 7.2/10. Published 2025-12-09.
How severe is CVE-2025-53949?: High severity. CVSS v3 base score is 7.2 out of 10.