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Hackers stole Social Security numbers in Flagstar data breach affecting 1.5 million customers


Flagstar Bank, one of the largest financial service providers in the United States, has notified more than 1.5 million customers of a data breach in which Social Security numbers were stolen — its second incident in two years.

In a letter sent to those affected, Michigan-headquartered Flagstar revealed that hackers breached its corporate network between December 3 and December 4, 2021. After an investigation, the bank discovered on June 2, 2022 that the threat actors accessed sensitive customer details.

“Flagstar recently experienced a cyber incident that involved unauthorized access to our network,” the company said in the letter. “Upon learning of the incident, we promptly activated our incident response plan, engaged external cybersecurity professionals experienced in handling these types of incidents, and reported the matter to federal law enforcement.”

It’s not clear why Flagstar took almost six months to detect the data breach. Flagstar spokesperson Susan Bergesen, when reached ...


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