MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface.
https://www.exploit-db.com/exploits/45578/
https://n0p.me/winbox-bug-dissection/
https://github.com/tenable/routeros/tree/master/poc/cve_2018_14847
https://github.com/tenable/routeros/tree/master/poc/bytheway
https://github.com/tenable/routeros/blob/master/bug_hunting_in_routeros_derbycon_2018.pdf