Ipswitch WS_FTP Professional before 12.6.0.3 has buffer overflows in the local search field and the backup locations field, aka WSCLT-1729.
https://www.exploit-db.com/exploits/43115/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-7707
https://docs.ipswitch.com/WS_FTP126/ReleaseNotes/English/index.htm