Science & Tech · Cybersecurity · 3 hrs ago
Mercado Bitcoin blocks $11 million after cryptocurrency hack
Brazilian cryptocurrency exchange Mercado Bitcoin was hacked early Monday, Nov.
2.
The company says about $38 million in crypto assets were involved in the incident.
So far, it says it has blocked about $11 million and identified other assets it may be able to block.
Mercado Bitcoin says customers will not lose their assets because of the incident.
It took its platform temporarily offline after detecting the attack, saying it would resume service only when it was safe.
The company has not yet said when service will return, but says it will share updates through its official channels.
It also warned customers to watch for scams and says it never asks for passwords, verification codes or recovery phrases.
Mercado Bitcoin said it blocked about $11 million in cryptocurrency after a cyberattack.
The Brazilian platform said the incident involved about $38 million in assets and that it had identified more funds that could be blocked.
It temporarily suspended deposits and withdrawals, saying customers would not lose assets because of the incident.
Blockchain security companies said more than $46 million had left the platform, a figure Mercado Bitcoin did not confirm.
Security experts disputed the company’s claim that customer funds were not accessed, citing evidence that hackers siphoned funds from some customer wallets.
- Who
- Mercado Bitcoin, a Brazilian cryptocurrency platform, was targeted by hackers.
- What
- The company said it blocked about $11 million in cryptocurrency after a cyberattack. It said the incident involved about $38 million in assets.
- When
- The attack was detected early on Monday, November 2, 2026. Security companies said funds left the platform late Sunday night.
- Where
- The platform is based in Brazil. The sources do not state where the hackers were.
- Why
- Not stated.
Mercado Bitcoin
Blockchain security experts
Customer funds
Mercado Bitcoin
The company said customers would not lose assets and that the attack did not harm customers.
Blockchain security experts
Experts cited blockchain evidence that hackers siphoned funds from some customer wallets.
Blockchain security companies said more than $46 million left the platform.
Mercado Bitcoin detected the attack and temporarily suspended platform services.
Mercado Bitcoin said it had blocked about $11 million in cryptocurrency.
- Amount blocked
- About $11 million in cryptocurrency
- Incident value
- About $38 million, according to Mercado Bitcoin
- Funds reported leaving platform
- More than $46 million, according to blockchain security companies
- Company customers
- About 4.5 million
- Location
- Brazil
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What people are saying
Our teams are mobilized – investigating the case, tracking the assets, and coordinating measures with the competent authorities.
As soon as the incident was detected, Mercado Bitcoin activated its governance protocols, notified the competent authorities and, for security, decided to temporarily take the platform offline until it was safe to resume.
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Comunicado oficial: Identificamos e contivemos com rapidez um incidente de segurança em um de nossos sistemas nesta madrugada. Reforçamos que: • Não houve nenhum prejuízo aos clientes; • Não houve vazamento de dados. Como medida preventiva de proteção, depósitos e saques
Tether froze more than 4.5M USDT related to this security incident.
Our investigators are tracking the Mercado Bitcoin security incident and are working with industry partners to identify, freeze, and disrupt impacted funds.