A data breach at SitusAMC, a vendor processing mortgage data, has raised alarms among major banks like JPMorgan, Citi, and Morgan Stanley regarding potential customer data exposure. The breach, discovered on November 12, involved access to sensitive corporate and possibly client information, prompting ongoing investigations and heightened security measures.

A significant data breach at Lotte Card has exposed personal information of over 1 million users, with estimates suggesting the leak could impact several million. The Financial Supervisory Service's investigation revealed the breach was much larger than the initially reported 1.7 GB. Lotte Card is set to apologize and announce response measures on the 18th.