A improper neutralization of special elements used in an os command ('os command injection') in Fortinet FortiSandbox version 4.4.0 up to and including 4.4.3 and 4.2.0 up to and including 4.2.6 and 4.0.0 up to and including 4.0.4 allows malicious user to execute unauthorized code or commands via crafted requests..