These Sinapsi devices store hard-coded passwords in the PHP file of the device. By using the hard-coded passwords in the device, attackers can log into the device with administrative privileges. This could allow the attacker to have unauthorized access.
https://www.cisa.gov/news-events/ics-advisories/icsa-12-325-01
https://exchange.xforce.ibmcloud.com/vulnerabilities/80200
http://www.us-cert.gov/control_systems/pdf/ICSA-12-325-01.pdf
http://www.sinapsitech.it/default.asp?active_page_id=78&news_id=88