An investigation is underway into an unprecedented cyberattack on hundreds of French supermarkets that is still spreading across the country. Hackers are taking over refrigeration systems, overriding temperature settings and pushing some refrigeration units above 120 degrees while stores were closed. Now, many are worried about how vulnerable these systems could be in any country. NBC's Tom Costello reports for TODAY. » Subscribe to TODAY: youtube.com/@TODAY TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: today.com Find TODAY on Facebook: facebook.com/today Follow TODAY on Twitter: twitter.com/TODAYshow Follow T...