The Brief Capital One customers reported widespread account access issues Thursday morning. The financial company told customers the problem was due to a technical outage involving a third-party vendor. Frustrated Capital One customers flooded social media Thursday morning with complaints about account access issues. Capital One accounts affected by outageCapital One said Thursday that a technical issue is disrupting customer access to accounts, deposits, and payment processing. Big picture view:The outage comes a day after Citibank experienced access issues for mobile accounts and ongoing problems with fraud alerts.