Blinkenlights for all: Cisco's building automation system vulnerable to manipulation
Cisco warns of several vulnerabilities in its Network Building Mediator (NBM), a system for interconnecting the technology in buildings with IP networks and web services. The NBM collects data such as the amount of electricity and gas used, the temperature, and other states of individual systems (for example via Modbus and BACnet) and normalises this data for further processing. The NBM can also send control data to a building's systems.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump