Hospira MedNet before 6.1 uses hardcoded cryptographic keys for protection of data transmission from infusion pumps, which allows remote attackers to obtain sensitive information by sniffing the network.
https://www.cisa.gov/news-events/ics-advisories/icsa-15-090-03
https://ics-cert.us-cert.gov/advisories/ICSA-15-090-03
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2015/icsa-15-090-03.json