Cruise giant Carnival Corp. has fallen victim to another data breach.
A hack in March may have exposed personal customer data, it said.
It could impact personal information of customers and employees of Carnival Cruise Line, Holland America Line and Princess Cruises.
The breach was detected on 19 March and the company instructed an external cybersecurity firm to investigate, said spokesman Roger Frizzell.
Carnival is making changes to strengthen data security.
The company notified impacted customers, saying Social Security numbers, passport numbers, dates of birth, addresses and health information may have been exposed.
It has not disclosed how many people are affected but has set up a call center to answer questions from concerned customers.
The company suffered two other data breaches last year in August and December, which were thought to be ransomware attacks.
