Hundreds of French supermarkets have been hit by a cyber-attack that caused their fridges and freezers to heat up, spoiling fresh and frozen food estimated to be worth millions of euros. Hackers gained control of the software that regulates the temperatures of the refrigeration units, forcing some to warm to 50C (120F) overnight, according to one supermarket chain affected. The chief executive of Coopérative U said several of its supermarkets had been hit by the "extremely serious and unpreced
