U.S. banking giants and mortgage lenders are on high alert following a data breach at SitusAMC, a financial technology company based in New York. The breach, confirmed on November 12, involved hackers stealing sensitive corporate data, including accounting records and legal agreements tied to SitusAMC's banking clients. While the exact amount of data taken remains unclear, the incident has raised concerns about the potential impact on millions of customers. SitusAMC acts as a technology provider for over a thousand commercial and real estate financiers, facilitating compliance with various regulations. The company processes billions of documents related to loans each year, highlighting the volume of non-public banking information at risk. Notable clients like JPMorgan Chase, Citigroup, and Morgan Stanley were among those notified about the breach, although there's no indication yet if any ransom demands have been made. The FBI is aware of the situation and is working with affected organizations to assess the breach's impact. They report no immediate operational disruption to banking services. SitusAMC claims the cyberattack is contained, and their systems are back online, but the investigation into the breach continues.