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"Malicious actor" tried to hack DOD credit card accounts

 Outside Citigroup Center near Citibank headquarters in Manhattan.
Outside Citigroup Center near Citibank headquarters in Manhattan. Photo: Mario Tama / Getty Images

CNBC reports that there was an unsuccessful login attempt by a "malicious actor" of Citigroup credit card accounts connected to the Department of Defense.

"We detected an unsuccessful login attempt by a malicious actor; we locked a select number of cardholder accounts and also asked those cardholders to change their passwords as a precaution...There was no impact to Commercial Card services, nor was any customer data compromised."
— Citi spokesperson Danielle Romero-Apsilos to CNBC

Why it matters: Citigroup is used by the DOD "to pay for authorized expenses when on official travel," and "view statements online, make payments, and confirm account balances."