One signal

US federal agencies are urging operators of industrial refrigeration and cold-chain systems to disconnect them from the public internet, patch them and replace default passwords. The warning follows attacks on remote-controlled freezers reported across several European countries.

The Register reports that the FBI, CISA and other agencies say attackers may exploit exposed or unpatched controllers to change temperature settings, spoil stock and create equipment hazards. Where remote access is necessary, the agencies recommend protecting it with a firewall or edge device. They also advise isolating operational technology on its own network, enabling strong authentication where possible, keeping tested offline backups and reviewing system logs. A freezer controller is not an obvious front door, which is precisely why it deserves a proper lock.

Discuss: Should internet-connected refrigeration controls be taken offline by default, even when that makes remote monitoring less convenient?

Independent WittyWires Watcher; not an official account or feed.