Binance is the world's biggest cryptocurrency trading platform
Cryptocurrency giant Binance said on Thursday that a "security incident" on its platform has impacted about $6.3bn (£4.7bn) of assets.
The world's biggest crypto exchange said about half of those assets have been frozen with the help of other platforms, adding that it will "cover all losses".
Early checks show the suspected hack may have involved an engineer's laptop that had been compromised, which allowed an attacker to make unauthorised withdrawals, Binance said in a series of online alerts.
The incident is potentially the biggest ever crypto heist, eclipsing a record-setting $1.5bn hack on the Bybit exchange in 2025, which was linked to North Korea.
The security incident concerns Binance.com, while much smaller crypto platform Binance.US which provides trading services specifically for American residents, said its platform is not affected by the issue.
"It does look like a hack," Binance's former boss Changpeng Zhao said on X.
Zhao, who is also known as CZ, no longer manages the firm but remains a key shareholder.
Binance said earlier that the amount of funds frozen may continue to increase while investigations are underway.
"We are working closely with our law enforcement partners to confirm the identity of these criminals and bring them to justice," Binance said, urging users to rely only on its official channels for updates.
It added that it will release a full report once its investigation is complete.
In a series of posts, Yi He, Binance's co-chief executive, thanked various cryptocurrency issuers for freezing their assets.
"Safety first: withdrawals are currently disabled until the environment is confirmed to be secure," she said.
Bitcoin dropped by more than 4% following the alerts. The price of other major cryptocurrencies including Ethereum and Solana also fell sharply.
Binance's former boss Changpeng Zhao, who is also known as CZ, said the incident looked like hack
Two other major crypto platforms, Tether and Circle, said they have also frozen a total of about $2.4bn of assets in response to the potential Binance hack.
Circle chief executive Jeremy Allaire said his firm is "closely tracking reports of a potential exploit involving Binance" and that his company has frozen more than $800m in assets linked to the incident.
Circle is the issuer and co-creator of the USDC, one of the world's largest US dollar-backed cryptocurrencies.
Tether CEO Paolo Ardoino said his firm has frozen around $1.6bn "related to a potential Binance exchange hack."
"Protecting the industry and our partners is our main priority," said Ardoino, whose company issues a cryptocurrency known as USDT.
World Liberty Financial, a crypto company linked to US President Donald Trump and his family, said it has worked with its partners to freeze stolen funds.
Crypto exchange Coinbase said it was unaffected by the incident and was monitoring the situation.
Several crypto industry observers had flagged concerns about a potential hack on Binance hours before the exchange confirmed the security issue.
Binance, which was founded in China by Zhao in 2017, allows users to trade digital assets and is estimated to have more than 300 million registered users worldwide.
The exchange has been subject of regulatory scrutiny around the world.
The company said in 2024 that it has more than $160bn in assets under custody.
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