GE Digital Energy MDS PulseNET and MDS PulseNET Enterprise before 3.1.5 have hardcoded credentials for a support account, which allows remote attackers to obtain administrative access, and consequently execute arbitrary code, by leveraging knowledge of the password.
https://ics-cert.us-cert.gov/advisories/ICSA-15-258-03
http://zerodayinitiative.com/advisories/ZDI-15-440/
http://www.gedigitalenergy.com/app/resources.aspx?prod=pulsenet&type=9