GE Healthcare Optima CT680, CT540, CT640, and CT520 has a default password of #bigguy for the root user, which has unspecified impact and attack vectors.
https://twitter.com/digitalbond/status/619250429751222277
https://ics-cert.us-cert.gov/advisories/ICSMA-18-037-02
http://www.forbes.com/sites/thomasbrewster/2015/07/10/vulnerable-breasts/