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

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Fortinet FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS contain an OS command injection vulnerability that allows an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.