Up to 1,500 businesses affected by ransomware attack, U.S. firm's CEO says

FILE PHOTO: A man types on a computer keyboard in Warsaw in this February 28, 2013 illustration file picture. REUTERS/Kacper Pempel/File Photo

WASHINGTON (Reuters) -Between 800 and 1,500 businesses around the world have been affected by a ransomware attack centered on U.S. information technology firm Kaseya, its chief executive said on Monday.

Fred Voccola, the Florida-based company's CEO, said in an interview that it was hard to estimate the precise impact of Friday's attack because those hit were mainly customers of Kaseya's customers.