NetWin SurgeFTP 2.0f and earlier encrypts passwords using weak hashing, a fixed salt value and modulo 40 calculations, which allows remote attackers to conduct brute force password guessing attacks against the administrator account on port 7021.

The administrative interface (surgeftpmgr.cgi) for SurgeFTP Server 1.0b through 2.2k1 allows remote attackers to cause a temporary denial of service (crash) via requests with two percent (%) signs in the CMD parameter.