[MapleStory Universe: Hacker Attack Leads to Partial User Data Leak, No Asset Loss] The blockchain game project MapleStory Universe (MSU)X platform announced that due to unauthorized external access to part of its off-chain server infrastructure, all services were placed under maintenance starting at 12:43 PM Beijing time on November 12, 2026. Preliminary investigations indicate that the blockchain and smart contracts were unaffected. On-chain records and wallet data show that no assets were transferred or stolen, and user wallet private keys are never uploaded to the MSU system. The attackers obtained records from some users since 7:26 AM on November 5th, including wallet addresses, nicknames, avatars, login history, some email addresses, associated social media account information, OpenAPI usage records, and transaction and service activity records, but did not include real names, phone numbers, physical addresses, KYC or payment card information.