Mercado Bitcoin Withdrawals Halted After Security Incident

Mercado Bitcoin withdrawals and deposits were suspended on November 2 after Brazil’s largest crypto exchange said it had identified and contained a security incident. The exchange says customers suffered no losses and no customer data leaked. It has not confirmed a loss total or given a reopening time.

Security firm Hypernative’s preliminary estimate puts suspicious transfers above $40 million across multiple networks, according to BeInCrypto and Bitcoin Magazine. Mercado Bitcoin has not confirmed the figure. The ownership of the assets involved also remains unclear.

What happened to Mercado Bitcoin withdrawals

In a November 2 statement on X, Mercado Bitcoin said it identified and quickly contained an overnight security incident in one of its systems. It suspended deposits and withdrawals as a protective measure while teams investigate, trace assets and coordinate with authorities. The exchange said customers suffered no losses and no customer data was leaked. Mercado Bitcoin’s statement did not identify the affected system or explain how the incident occurred.

In a later update, the exchange said it was working to restore operations safely and shared destination addresses to help track assets. The reports provided no reopening timetable or confirmation that all funds involved had been located. At the time of those reports, Mercado Bitcoin withdrawals and deposits remained suspended. The exchange had not disclosed its own estimate of any losses. The exchange’s follow-up said the addresses were shared to support asset tracking.

Bitcoin Magazine reported that Hypernative’s preliminary monitoring showed more than $40 million in suspicious transfers across several blockchains. BeInCrypto reported activity involving wallets on at least 10 networks. These are outside estimates, not figures confirmed by Mercado Bitcoin. The exchange has not said whether the assets involved belonged to customers or to the company.

Decrypt reported that Tether froze more than 4.5 million USDT linked to the incident. Mercado Bitcoin has said it is tracing assets, but has not provided a total loss figure or detailed the status of the remaining funds.

Background and context for the security incident

BitNotícias reported that the observed activity consisted of ordinary cryptocurrency transfers across multiple networks, rather than an identified smart-contract exploit. The outlet said it remained unknown how the transfers were authorized. Mercado Bitcoin has not explained the incident’s entry point or identified which system was affected.

Bitcoin Magazine reported that the exchange published destination addresses for Bitcoin, Ethereum-compatible networks, Solana, Stellar and Tron to support identification and tracking. The exchange has not said in the reports what ultimately happened to all assets associated with those addresses.

The Mercado Bitcoin incident follows a separate security event involving Binance. The Associated Press reported that Binance disclosed an estimated $6.3 billion impact from an October 29 incident and said roughly $3 billion had been frozen on-chain. This was a separate incident from Mercado Bitcoin’s; the supplied reports do not establish a connection between them.

Mercado Bitcoin’s temporary suspension meant customers could not deposit or withdraw through the platform while the exchange worked to restore operations. The exchange said the measure was precautionary and that it was investigating, tracing assets and coordinating with authorities. Its statements did not provide further details about the affected system or the investigation’s findings.

Market reaction remains difficult to isolate

Major crypto assets were lower over the 24 hours to 17:43 UTC on November 2, according to CoinGecko market data. These figures describe the broader market backdrop and do not establish that Mercado Bitcoin’s incident caused the declines. The available data does not isolate a price response to the exchange’s announcement.

Asset	Price at 17:43 UTC, Nov. 2	24-hour change
Bitcoin (BTC)	$76,967	-1.35%
Ethereum (ETH)	$2,252.63	-0.61%
Solana (SOL)	$92.47	-2.29%

Alternative.me’s Crypto Fear & Greed Index stood at 37, classified as Fear, on November 2. The reading measures broad market sentiment. It does not establish that the Mercado Bitcoin incident affected prices. The supplied data does not show whether the reported price moves were specifically tied to Mercado Bitcoin withdrawals.

What to watch next

The exchange has not announced when deposits and withdrawals will resume or identified the system involved. Its statement said customers suffered no losses, but the reports do not provide further detail on how the exchange assessed customer impact.

Further updates may provide a loss assessment, progress in tracing assets, or information about coordination with authorities. Tether’s reported freeze is one confirmed response to the incident, but Mercado Bitcoin has not described the status of the remaining funds. The estimate above $40 million should remain attributed to Hypernative and treated as preliminary, not as a confirmed loss figure.

Mercado Bitcoin has said it is working to restore operations safely, but it has not said whether withdrawals will return in stages or when services may resume. Its next statements may clarify the restoration plan and the investigation. Further reporting could change what is known.

FAQ

Why are Mercado Bitcoin withdrawals paused?

Mercado Bitcoin says it suspended deposits and withdrawals as a precaution after identifying a security incident in one of its systems. It has not said which system was affected or how the incident occurred.

Did the Mercado Bitcoin security incident cause $40 million in losses?

The exchange has not confirmed that amount. Hypernative’s preliminary estimate puts suspicious transfers above $40 million, according to Bitcoin Magazine and BeInCrypto. Mercado Bitcoin has not disclosed its own loss figure and says customers suffered no losses.

When will Mercado Bitcoin withdrawals reopen?

The exchange has not announced a reopening time. It says it is working to restore operations safely. Its updates said it would provide further information as it investigates.

Sources

• Mercado Bitcoin (@MercadoBitcoin), security incident statement (x.com)
• Mercado Bitcoin (@MercadoBitcoin), incident update and destination addresses (x.com)
• Brazil's Largest Exchange Mercado Bitcoin Halts Withdrawals After $40 Million Hack (Decrypt)

This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrencies are highly volatile; always do your own research before investing.