An improper neutralization of special elements used in a command ('command injection') vulnerability [CWE-77] in FortiNAC tcp/5555 service may allow an unauthenticated attacker to copy local files of the device to other local directories of the device via specially crafted input fields. To access the copied data, however, the attacker must have an already existing foothold on the device with sufficient privileges.
https://www.tenable.com/blog/cve-2023-33299-critical-remote-code-execution-vulnerability-in-fortinac