SEOUL, February 25 (AJP) - Coupang Inc., the American operator of the biggest ecommerce platform in South Korea, disclosed on Wednesday that a massive data breach involving 33.7 million accounts included approximately 200,000 users located in Taiwan.
The e-commerce giant cited a forensic analysis by cybersecurity firm Mandiant, which linked the Taiwanese breach to the same former employee responsible for the unauthorized access of South Korean user data in November 2025. While the perpetrator accessed 200,000 accounts in Taiwan, investigators found that data from only one of those accounts was actually saved by the individual.
The update follows a series of forensic audits aimed at determining the full scope of the security failure. Mandiant and other third-party experts confirmed that "highly sensitive information" was not leaked in any region, including Taiwan. The compromised data was reportedly limited to basic contact information and order histories rather than passwords, financial records, or government-issued identification numbers.
The breach originally came to light on November 29, 2025, after a former software developer, identified as a Chinese national, allegedly used an internal signing key to bypass security protocols. South Korean authorities previously noted that the incident stemmed from a failure to revoke authentication credentials after the employee left the company.
Coupang Inc. had initially stated in December 2025 that there was no evidence of Taiwanese customers being affected. The company has since clarified that the former employee saved data from a total of approximately 3,000 accounts globally, including the single account in Taiwan.
The disclosure arrives as Coupang Inc. aggressively expands its logistics footprint in Taiwan. The company stated it has been coordinating with the Ministry of Digital Affairs in Taiwan and South Korean regulators throughout the investigation. No instances of secondary harm or identity theft related to the breach have been detected.
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