CERT-FR, the French government's computer emergency response team, said in an alert published in French on October 12 that it is aware of numerous compromises affecting two Danfoss controller series, the AK-SM and the AK-SC.

Neither French authorities nor Danfoss has so far said who carried out the attack or how the attackers got into the controllers.

Controller Status, According to Danfoss Advice From CERT-FR and Danfoss AK-SM 800 End of life since May 2021.

Danfoss told Cooling Post it was working with customers on "firmware updates where available, stronger network protections and removing direct internet exposure where applicable."

The Inquiry and Reports From Other Countries The Paris prosecutor's office has opened an inquiry on its own initiative, it told AFP.