A significant data breach has been disclosed by South Korea, affecting its diplomats globally. The National Diplomatic Academy's online education system was compromised for ten months, resulting in the theft of personal information of current and former Ministry of Foreign Affairs employees, including those serving overseas. This breach has major implications for the security of sensitive information. The stolen data may be used for targeted phishing attacks or other malicious activities, potentially jeopardizing national security1. The prolonged nature of the breach suggests a lack of adequate monitoring and detection capabilities. This incident highlights the importance of robust cybersecurity measures, especially for institutions handling sensitive information. The breach's impact on diplomatic operations and national security is a significant concern, so what matters most to practitioners is the need to enhance their defensive strategies to prevent similar incidents.