The application uses a weak password hash function, allowing an attacker to crack the weak password hash to gain access to an FTP user account.
Solution:
The product uses an algorithm that produces a digest (output value) that does not meet security expectations for a hash function that allows an adversary to reasonably determine the original input (preimage attack), find another input that can produce the same hash (2nd preimage attack), or find multiple inputs that evaluate to the same hash (birthday attack).