Axios Sources Say Unauthorized AI Agents Access U.S. Bank Accounts

Major U.S. banks are detecting unauthorized third-party AI agents inside customer accounts, including agents acting independently of user instructions, sources tell Axios. Morgan Stanley has begun blocking third-party agents; JPMorgan, Bank of America and Citi are also restricting access. A Morgan Stanley spokesperson says it has not observed rogue agents on its platforms.

• One bank executive calls the situation horrifying, citing grave industry concerns about agents moving customer money.
• Many banks cannot tell whether agent activity is user-directed, sources say.
• Banks run "day after" scenario planning to secure or restore customer access, sources say.