T1 security incident history
Hacking, data breaches and other security incidents involving T1, with related coverage.
Douzone Bizon backup service breach may expose T1 players' personal data
↳ Knock-on damage from the DOUZONE BIZON incident · View original incidentImpact: Potential leak of resident registration numbers, passport numbers and salary records belonging to players and others
A breach of Douzone Bizon's backup service may have exposed personal information belonging to T1 players and others. T1 identified resident registration numbers, passport numbers and salary records as potentially leaked data. An investigation is under way to determine whether any data was actually leaked.
Read on 제로위즈 매거진 ↗T1 suspends players' personal streams as DDoS attacks recur
Impact: Temporary suspension of players' personal streams
As DDoS attacks recurred, T1 temporarily suspended its players' personal streams on 6 January 2025. After defences for the players' connections were strengthened, attackers even began targeting teammates playing in the same game during streams. The LCK said it would resolve the issue in the near future.
Read on 게임메카 ↗T1 X account hacked; warning issued over suspicious coin-launch URLs
T1's X account was hacked, prompting warnings not to click suspicious URLs related to a coin launch. The specific scale of the damage and the response measures have not been confirmed.
Read on 뉴스1 ↗Persistent DDoS attacks disrupt T1 training and personal streams
Impact: Disruption to roster training, play-off preparations and personal streams, plus financial losses
Since March 2024, DDoS attacks targeting the T1 roster have disrupted players' individual practice and streaming. On 4 April, the team was again unable to carry out solo queue practice normally, hampering its play-off preparations. After measures were taken to protect the players, even ordinary players who played alongside them became targets, and in June T1 suspended its LoL roster's streaming indefinitely.
Related reports: 7 · last report →