Mercado Bitcoin Suspends Deposits and Withdrawals After $40M Multi-Chain Drain

TL;DR Mercado Bitcoin suspended deposits and withdrawals after wallets across at least 10 blockchains were drained, with researchers estimating losses above $40 million. The transfers used ordinary blockchain transactions rather than a smart contract exploit, while investigators have not established how the attacker obtained signing access. Tether froze $4.5 million in linked USDT. Mercado Bitcoin says customers were not harmed, and no evidence connects the incident to the recent Binance breach. Mercado Bitcoin suspended deposits and withdrawals after a security incident drained wallets across at least 10 blockchains , with researchers estimating losses above $40 million. An onchain report shared by Pablo Sabbatella tracked outflows between 06:19 and 06:53 UTC. The Brazilian exchange said it contained the incident, customers were not harmed and no data was breached.

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