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Mercado Bitcoin Suspends Operations After Security Incident in Brazil

Cryptelio Editorial Published 2 Nov 2026 · 15:31 UTC

Mercado Bitcoin, the leading cryptocurrency exchange in Brazil, has temporarily suspended all deposits and withdrawals after detecting a security incident within its systems. The company confirmed the situation on Monday, stating that it swiftly contained the issue and that no customer losses or data breaches occurred.

According to blockchain security firm Hypernative, the incident may involve approximately $40 million in suspicious outflows from the exchange’s wallets. The suspicious activity was first noted late Sunday night, with funds reportedly transferred to newly created addresses linked to a potential attacker.

Mercado Bitcoin, which boasts over 4.8 million clients, has mobilized its teams to investigate the incident, trace the assets, and collaborate with relevant authorities. The exchange has not provided a timeline for when operations will resume.

Founded in São Paulo in 2013, Mercado Bitcoin has established itself as a significant player in the digital asset market. The recent security incident follows a notable hack of Binance, which raised concerns about the security of cryptocurrency exchanges.

Latest Developments on Mercado Bitcoin Security Incident

  • Mercado Bitcoin has suspended all deposits and withdrawals following a security incident, affecting customer access to funds.
  • The company claims to have identified and contained the incident, assuring customers that no losses were incurred and no data was leaked.
  • Preliminary estimates from blockchain security firm Hypernative suggest suspicious transfers exceeding $40 million across various blockchains, though this figure has not been confirmed by Mercado Bitcoin.
  • Tether has frozen over 4.5 million USDT associated with the incident, following its $20 million investment in Mercado Bitcoin earlier this year.
  • This incident follows a significant breach at Binance, where attackers accessed $6.3 billion in assets, attributed to North Korean hackers by the FBI.
  • Law enforcement agencies, including the U.S. Secret Service, are actively involved in tracing and freezing funds linked to the recent attacks across multiple exchanges.

Latest Update on Mercado Bitcoin Security Incident

Mercado Bitcoin has suspended withdrawals and deposits after a significant security breach, with estimated losses now exceeding $46 million.

The exchange has stated that there was no harm to customers and no data breach reported. The suspension is described as a precautionary measure while investigations are ongoing.

Analyst Emmett Gallic from Akrham reported that the hacker is actively sweeping old deposit addresses and liquidating stolen assets, including memecoins and altcoins.

In related news, Binance recently experienced a hack resulting in over $6 billion in losses, marking it as the largest heist in crypto history.

The US Secret Service is now involved in the investigation of the Mercado Bitcoin incident, which is suspected to be linked to a North Korea-affiliated hacking group.

FAQ

What caused Mercado Bitcoin to suspend operations?

Mercado Bitcoin suspended operations after detecting a security incident within its systems, which involved approximately $40 million in suspicious outflows from the exchange's wallets.

Have any customer losses or data breaches occurred?

No customer losses or data breaches have occurred, as confirmed by Mercado Bitcoin.

What actions is Mercado Bitcoin taking in response to the incident?

Mercado Bitcoin has mobilized its teams to investigate the incident, trace the assets, and collaborate with relevant authorities.

How many clients does Mercado Bitcoin have?

Mercado Bitcoin has over 4.8 million clients.

Is there a timeline for when operations will resume?

The exchange has not provided a timeline for when operations will resume.

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