An uncontrolled resource consumption (denial of service) vulnerability in FortiSandbox and FortiAuthenticator login modules may allow an unauthenticated attacker to bring the device into an unresponsive state via specifically-crafted long request parameters.
An improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.