The default configuration of Tridium Niagara AX Framework through 3.6 uses a cleartext base64 format for transmission of credentials in cookies, which allows remote attackers to obtain sensitive information by sniffing the network.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-3003
http://www.us-cert.gov/control_systems/pdf/ICSA-12-228-01.pdf