Researchers warned attackers could 'defrost the food' months before French supermarkets got hit

Security researchers warned about exploitable vulnerabilities in refrigeration controllers months - and in one case, more than a year - before cyberattacks disrupted hundreds of French supermarkets. Late Sunday night, unknown criminals hacked thousands of controllers, cranking the heat as high as 122°F (50°C), spoiling food and sparking fires across nearly 700 of the country’s supermarkets.

Summary from The Register Security.