CVE-2026-25089

The vulnerability involves improper neutralization of special characters used in operating system commands (CWE-78). An attacker can send a specially crafted HTTP request containing malicious elements that are not properly filtered before being passed to the system command interpreter. Since the exploit does not require authentication or user interaction, the attack can be carried out remotely over the network without any prerequisites.

An attacker can execute arbitrary operating system commands on the device or cloud instance, which in practice may result in complete system takeover, data breach, configuration modification, or service disruption.

Apply patches available from the vendor according to references (https://fortiguard.fortinet.com/psirt/FG-IR-26-141). Until patches are deployed, it is recommended to restrict access to the HTTP/HTTPS interface of FortiSandbox devices exclusively to trusted IP addresses and monitor network traffic for anomalous HTTP requests.

Fortinet FortiSandbox 5.0.0–5.0.5, FortiSandbox 4.4.0–4.4.8, FortiSandbox 4.2 (all versions), FortiSandbox Cloud 5.0.4–5.0.5, FortiSandbox PaaS 5.0.4–5.0.5