EasyIO EasyIO-30P-SF controllers with firmware before 0.5.21 and 2.x before 2.0.5.21, as used in Accutrol, Bar-Tech Automation, Infocon/EasyIO, Honeywell Automation India, Johnson Controls, SyxthSENSE, Transformative Wave Technologies, Tridium Asia Pacific, and Tridium Europe products, have a hardcoded password, which makes it easier for remote attackers to obtain access via unspecified vectors.