Coupang User Exodus Accelerates After Record Data Breach

Coupang's monthly active users plummeted to 33.2 million in January, a 3.2% monthly decline that marks the steepest drop since South Korea's largest-ever data leak exposed 33.7 million accounts. The e-commerce giant now faces mounting regulatory scrutiny and reputational damage just as voucher compensation programs and government privacy reforms take effect.

Investigators trace the breach to lax authentication protocols and compromised cryptographic keys—with attackers maintaining access for five months before detection. While Coupang initially downplayed the incident as affecting 4,500 accounts, the scale of exposure now threatens record fines under Korea's toughened personal information protection laws.

The user decline compounds existing pressure on CPNG shares, which have underperformed since November's disclosure. Analysts note the breach occurred during critical holiday shopping periods, with security oversights persisting despite previous warnings about employee access controls.