Bangladesh Bank exposed to hackers by cheap switches, no firewall

Major oversight: You are talking about an organisation that has access to billions of dollars and they are not taking even the most basic security precautions, said Wichman.

"It could be difficult to hack if there was a firewall," Alam said in an interview.

The lack of sophisticated switches, which can cost several hundred dollars or more, also means it is difficult for investigators to figure out what the hackers did and where they might have been based, he added.