Key Findings Coupang, a major e-commerce company in South Korea, has suffered a massive data breach affecting over 33.7 million accounts - more than half of the country's population. The breach was initially detected on November 18, 2025, when suspicious activity was observed on around 4,500 accounts. Further investigation revealed that the breach actually dated back to late June 2025 and had compromised the personal information of nearly the entire Coupang user base. Exposed
