Choi Joo-hee, CEO of South Korean streaming service Tiving (TVING), publicly apologized at a press conference on 2026-07-03 for a cyberattack that leaked 39.54 million user accounts and 361 technical assets including source code. ^[1] South Korea's Ministry of Science and ICT joint public-private investigation team said on 2026-07-03 that Tiving leaked personal information from 39.54 million accounts, including 22.06 million active, 17.37 million dormant or deleted, and 0.11 million test accounts. ^[2] The ministry investigation found on 2026-07-03 that an unidentified attacker stole a developer access key on 2026-05-29, used it to break into Tiving's development environment, and exfiltrated 361 development projects containing source code, totaling about 30.35 GB. ^[3] Data submitted by Democratic Party lawmaker Lee Jung-heon from the Personal Information Protection Commission and the Ministry of Science and ICT puts the number of victims tallied so far at about 19.53 million. ^[4] TVING, a South Korean OTT streaming service, will hold an official apology and explanation session on the 3rd at a hotel in Jung-gu, Seoul, with CEO Choi Joo-hee and other executives attending, about three months after its personal information leak became known in June 2025. ^[5] The same ministry investigation reported on 2026-07-03 that the leaked data involved 20 fields and 70 types of information, including names, birth dates, mobile phone numbers, email addresses, and CI (linked connection information). ^[6] At the session, TVING will present an official apology, information security strengthening plans, customer compensation measures, and hold a question-and-answer session. ^[7] TVING announced in June 2025 that an unidentified hacker accessed the database storing user personal information and leaked personal information files. ^[8]