Finastra, a global leader in financial technology that serves 45 of the world’s top 50 banks, has confirmed a major data breach.

Finastra has confirmed it warned customers of a cybersecurity incident after a threat actor began selling allegedly stolen data on a hacking forum.

Finastra, a London-based financial software company that serves most of the world’s top banks, has confirmed it’s investigating a data breach after a hacker claimed a compromise of the company's internal file-transfer platform.

Alleged theft involved 400 GB of customer and internal data presumably containing sensitive financial details.

London-based Finastra has offices in 42 countries and reported $1.9 billion in revenues last year. The company employs more than 7,000 people and serves approximately 8,100 financial institutions around the world.

Finastra says it is investigating which institutions might have had data compromised.