Ten vulnerabilities in Copeland controllers, which are found in thousands of devices used by the world's largest supermarket chains and cold storage companies, could have allowed miscreants to manipulate temperatures and spoil food and medicine, leading to massive supply-chain disruptions. The flaws, collectively called Frostbyte10, affect Copeland E2 and E3 controllers, used to manage critical building and refrigeration systems, such as compressor groups, condensers, walk-in units, HVAC, and lighting systems. Three received critical-severity ratings.