US Officials Warn of Cyberattacks Targeting Industrial Refrigeration Systems

Five federal agencies issued a joint warning on Thursday regarding ongoing cyber threats to industrial refrigeration and cold chain monitoring systems used in the healthcare, agriculture, and transportation sectors.

The Cybersecurity and Infrastructure Security Agency (CISA), the FBI, and the departments of Health and Human Services, Agriculture, and Transportation stated that hackers are exploiting unpatched or internet-connected systems. According to CBS News, the agencies warned that successful exploits allow attackers to remotely change temperatures, which could lead to inventory loss, fire hazards, and reduced equipment lifespan.

The federal notice advises businesses to protect their infrastructure by updating software, strengthening passwords, and disconnecting refrigeration devices from the public internet. CISA official Chris Butera stated that every organization relying on these monitoring systems should consider itself a potential target. While the agencies did not confirm if U.S. commercial systems have been successfully breached, TechCrunch reported that the Department of Defense is investigating a series of hacks targeting freezers at six U.S. military bases.

The warning follows a wave of cyberactivity across Europe and the United Kingdom. TechCrunch and CBS News reported that hackers recently caused food spoilage at grocery chains in Luxembourg, Belgium, and Sweden by triggering unexpected temperature spikes. In France, officials revealed that hackers attempted to raise temperatures at several blood banks within the national emergency blood supply network, though TechCrunch noted the attack was stopped before blood stores were compromised.

Security researchers and U.S. officials have pointed toward Iran as the likely source of the attacks, according to TechCrunch. Some of the incidents involved remote-controlled units produced by Danfoss, a Danish company that had reportedly stopped providing security updates for the affected freezer models.

Background

The Department of the Army Criminal Investigation Division launched an investigation into refrigeration outages that occurred at U.S. military bases in August. These incidents preceded the broader federal warning regarding vulnerabilities in commercial and industrial cold chain infrastructure.