Mercado Bitcoin Faces $46M Theft as Funds Move Post-Suspension

• Hackers steal over $46 million from Brazil’s largest crypto exchange; funds continue to move after partial suspension
• User balances reportedly unharmed, but incident may trigger regulatory scrutiny and data protection reviews

On November 3, 2026, Cointelegraph reported that Mercado Bitcoin, the largest cryptocurrency exchange in Brazil, suffered a $46 million theft in a major security breach. Hackers made unauthorized wallet transfers even after the exchange suspended deposits and withdrawals in an effort to contain the attack. Security firm analyses confirmed the assailants used standard wallet transfers, not smart contract vulnerabilities.

According to Mercado Bitcoin, no user assets or personal data were compromised. The exchange stated that funds remain secure and it is cooperating with an ongoing investigation. Sources noted that stablecoin issuers Tether and Circle froze about $6.2 million related to the breach within hours, helping to stem immediate losses.

Despite these assurances, blockchain analysts at TokenPost and Certik reported that suspicious transfers continued after the operational pause. Roughly $20 million was routed to new wallets, with another $20 million still under hacker control. This ongoing movement highlighted possible shortcomings in internal security controls and transparency at Mercado Bitcoin.

As of November 3, Mercado Bitcoin had yet to release a detailed breach report or confirm any official alert to Brazil’s national data protection authority (ANPD). Under Brazil’s General Data Protection Law (LGPD), companies must promptly notify authorities if customer data or transaction details are at risk. Even without confirmed data exposure, the scale of the hack and continued asset movements are likely to intensify regulatory scrutiny of the exchange’s practices.

Analysts pointed out that, although users reportedly avoided direct losses, Mercado Bitcoin’s limited disclosure and the continued activity from compromised wallets could dent investor confidence and prompt withdrawals. The case follows a series of regional exchange hacks, raising the risk of stricter oversight and growing caution among Latin American crypto investors.

As of November 3, 2026, 03:09 UTC, Bitcoin traded at $76,742.37 (down 2.12% in 24 hours), Ethereum at $2,250.07 (down 1.92%), Tether at $0.998 (down 0.02%), and USDC at $1.00 (down 0.00%), according to market data.