The outage affects ATMs, online and mobile banking.
The CFPB report was produced in 2017, but only released in Dec. 2018 as a result of a Freedom of Information Act request.
The bank had a profit of $6.15 billion, or $1.16 per share in the year ago quarter.
The settlement would also reportedly cover allegations of improper insurance referrals and incorrect mortgage rate lock extension fees.
Warren, who sits on the Senate Banking Committee, has long advocated for harsh disciplinary action against Wells Fargo.