Brazil's largest crypto exchange Mercado Bitcoin has disclosed a specific on-chain address holding approximately 6.7 million stolen Stellar (XLM) tokens, following a security incident that led to suspicious outflows exceeding $40 million. The breach, which occurred shortly after the platform passed a local licensing deadline, involved asset movements across at least 10 blockchains, including Ethereum, Bitcoin, Solana, Tron, and Stellar. The exchange has temporarily suspended deposits and withdrawals as a precaution, assuring clients that their assets are safe and no data leak occurred. Mercado Bitcoin is coordinating with authorities and tracking assets, but has not yet confirmed the exact amount involved, the compromised system, or a date for resuming normal operations.