The information that hackers grabbed ranged from Social Security numbers, addresses and account numbers of mortgage holders
The hack took place on July 5 after breaking into computers at the insurance services provider Overby-Seawell Company, according to a letter that Cleveland-based KeyBank sent to affected residential mortgage customers.
KeyBank operates in 15 states and has close to $200 billion in assets.
The bank did not reveal how many customers were affected.
Overby-Seawell did not respond to phone messages and emails sent to executives by Associated Press seeking comment.
In the statement sent Friday to The Associated Press, KeyBank said Kennesaw, Georgia-based Overby-Seawell “suffered a cybersecurity incident that compromised data of its corporate clients.” It did not elaborate.
Overby-Seawell is a subsidiary of the Breckenridge Group.
“We take this matter very seriously and have notified all affected individuals,” KeyBank said in a letter.
