South Korean E-Commerce Giant Coupang Probes Massive Breach

Chinese Developer Formerly Employed by Company Suspected of Data Theft Mathew J. Schwartz (euroinfosec) • December 2, 2025

South Korea's biggest online retailer, Coupang, is warning most of the nation's populace that their data was exposed in a months-long, massive breach.

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Coupang said the breach appeared to be perpetrated using overseas servers, began on June 24 and continued until last month. It led to the theft of data pertaining to 33.7 million customers in a country of 52 million.

"Coupang is currently reviewing changes to its existing data security devices and systems to better protect customer data from future incidents," said Park Dae-jun, Coupang's CEO, in a statement posted to the company's website on Sunday.

Exposed information includes names, email addresses, phone numbers, shipping addresses and some order information, the company said. Passwords and other account ...