Seoul: Personal information of employees at Korean Air Co., South Korea's largest flag carrier, has been leaked after a partner firm supplying in-flight meals and onboard sales services was hit by a cyberattack, according to industry sources Monday.

According to Yonhap News Agency, Korean Air issued an internal notice earlier in the day informing employees that KC and D, the airline's catering and onboard sales supplier, had recently suffered a cyberattack by a hacker group. This incident is part of a series of recent data breach cases among major businesses in different sectors, including Coupang Inc., KT Corp., and Shinhan Card Co.

The airline reported that the breach led to the exposure of personal data of Korean Air employees stored on KC and D's servers, including names and phone numbers. Korean Air became aware of the incident after being notified by KC and D and has taken immediate emergency security measures, reporting the case to relevant authorities.

Korean Air has also urged its employees to remain vigilant against potential secondary damage, advising them to be cautious of suspicious text messages or emails.