SQL-Ledger suffers from cross site scripting, cross site request forgery, local file inclusion, SQL injection, and various other security vulnerabilities.
Alt-N SecurityGateway is prone to a buffer overflow condition. This is due to insufficient bounds checking on the "username" parameter. Successful exploitation could result in code execution with SYSTEM level privileges. NOTE: This service doesn't restart, you'll only get one shot. However, it often survives a successful exploitation attempt.