The Ohio Lottery is sending data breach notification letters to over 538,000 individuals affected by a cyberattack that hit the organization's systems on Christmas Eve.
American telecom provider Frontier Communications is restoring systems after a cybercrime group breached some of its IT systems in a recent cyberattack.
Optum's Change Healthcare has started to bring systems back online after suffering a crippling BlackCat ransomware attack last month that led to widespread disruption to the US healthcare system.
Healthcare giant UnitedHealth Group confirmed that its subsidiary Optum was forced to shut down IT systems and various services after a cyberattack by "nation-state" hackers on the Change Healthcare platform.
Japanese car maker Nissan is investigating a cyberattack that targeted its systems in Australia and New Zealand, which may have let hackers access personal information.
Toyota Financial Services (TFS) has confirmed that it detected unauthorized access on some of its systems in Europe and Africa after Medusa ransomware claimed an attack on the company.
Insurance giant American Family Insurance has confirmed it suffered a cyberattack and shut down portions of its IT systems after customers reported website outages all week.