SitusAMC Cyber Breach Sparks Fallout for JPMorgan, Citi, and Morgan Stanley

A cyberattack on fintech firm SitusAMC has major US banks scrambling to assess potential data exposure tied to mortgages and real estate loans.

A cyberattack on mortgage-processing vendor SitusAMC has big banks bracing for fallout. And the scope may be wider than anyone expected.

SitusAMC said it discovered unauthorized access to its systems on Nov. 12. The firm later confirmed that the attackers stole internal corporate data tied to some client relationships, including accounting records and legal agreements. The company also acknowledged that some information about its clients’ customers may have been affected, though the scope “remains under investigation.”

Multiple major banks, including JPMorgan Chase, Citigroup, and Morgan Stanley, were notified by SitusAMC that their data may have been compromised in the breach, according to reports from multiple outlets, including Bloomberg and CNN.

The attack has left lenders scrambling internally to determine whether customer data ...