The Thinkng Bull cyberattack targeted the Seoul-based math academy headquartered in Daechi-dong. The attack has exposed the personal information of students and parents, drawing scrutiny from South Korea's data protection authorities.  

The National Math Academy, which runs roughly 80 branches across the country, disclosed the breach to parents on September 17, confirming that an unidentified hacker had infiltrated its exam reservation website. 
Details of the Thinkng Bull Cyberattack 

According to the academy, the intruder informed staff that they were "securing all data," language that led Thinkng Bull to conclude there was a high likelihood that the personal details of every parent ...