Use of hard-coded credentials vulnerability exists in STARDOM FCN Controller and FCJ Controller R4.10 to R4.31, which may allow an attacker with an administrative privilege to read/change configuration settings or update the controller with tampered firmware.
https://www.cisa.gov/uscert/ics/advisories/icsa-22-174-01
https://web-material3.yokogawa.com/19/32885/files/YSAR-22-0007-J.pdf
https://web-material3.yokogawa.com/1/32885/files/YSAR-22-0007-E.pdf