Crypto exchange Binance freezes billions in funds amid potential $6.3bn security breach

Binance, the world’s largest cryptocurrency exchange, has said it’s investigating reports of a potential $6.3bn security breach that analysts said could amount to the most significant incident relating to digital assets on record.

It wasn’t immediately clear the extent of the damage hackers might have been able to cause, and Binance did not explicitly confirmed that funds had been stolen. The company said its teams are “working around the clock” to resolve the issue.

“Rest assured that user funds are completely safe,” a Binance spokesperson said in a statement.

Binance said it had worked with partners to ⁠freeze the affected assets, with about $3bn ⁠located so far. It gave no update on ​the status of the remaining $3.3bn as Binance co-founder Yi He said the company would cover “all hacking losses”.

An initial investigation suggested the breach may have started with a hacked laptop belonging to one of its engineers, which let an attacker gain access to one of its systems and ⁠make unauthorised withdrawals, Binance said.

Binance, which allows users to buy, sell and trade digital assets, has 335 million registered users globally and had about $162.8bn in assets under custody as of the exchange’s 2025 annual report.

“User funds remain safe,” Binance said in a statement. “As a precaution, all deposits and withdrawals are temporarily suspended while our security teams conduct checks, secure wallet infrastructure, and trace affected assets, with the close support of our law enforcement and industry partners.”

Markets reacted immediately in early Asian trading on Friday, and bitcoin dropped more than 3% to a six-week low of $76,368. Shares in crypto exchange Coinbase Global slid 4.8% while those of bitcoin buyer Strategy fell nearly 6% in extended US trading.

Binance was founded in 2017 by Changpeng Zhao, who in 2023 pleaded guilty to a felony related to his failure to prevent money laundering on the platform and stepped down as CEO. Donald Trump pardoned him in 2025.

Zhao posted to X on Thursday that “User funds are safe!” but added that the incident “does look like a hack on Binance.” He added that while he doesn’t manage Binance any more, “as a shareholder, I expect all user funds will be fully covered.”

If confirmed, the incident could be the world’s biggest crypto ​heist, according to analytics firm Chainalysis and other industry experts. “It’s the biggest hack in history,” said Aravind ‌Srinivasan, head of large crypto market maker GSR’s systematic ‌OTC business.

Beyond the potential loss of assets, the security breach was likely to have wider ramifications for crypto, which had already been under pressure lately due to higher US interest rates and softer demand from ‌exchange-traded fund buyers, analysts said.

“It may further dampen risk appetite and prompt investors to reassess the safety of assets held on centralised exchanges, as well as counterparty, solvency and liquidity risks,” said Tim Sun, senior researcher at HashKey Group, based in Hong Kong.

Binance runs a secure asset fund for users, which is a reserve held entirely in ‌bitcoin that is intended to protect user assets in cases of security breaches, according to its website.

“It’s becoming very hard to counter hacks as AI can find vulnerabilities faster than you can fix them,” said Bernardo Brites, CEO of Trace Finance, a payments and stablecoin infrastructure company.

“My view is that users will move away from smaller ​and medium-sized exchanges, [as it is] becoming too risky to park your money somewhere that couldn’t cover a hack of meaningful size.”

Stablecoin issuer Tether said it had frozen nearly $1.57bn in assets linked to the incident, while Circle froze more than $800m.

World Liberty Financial, a crypto company linked to Trump and his family, said on Thursday it had worked with cryptocurrency custodian BitGo to freeze funds stolen in what it described as a Binance hack. Binance’s Yi said $27m in stablecoins and about $2m worth of World Liberty tokens had been frozen.

The incident adds to a string of crypto thefts. Last year, attackers stole $2.9bn worth of cryptocurrency across nearly 150 attacks, according to researchers ​at TRM Labs. In September, cryptocurrency exchange Bitget ‌said roughly $350m in crypto had ​been stolen from its platform, underscoring the industry’s vulnerability ​to hackers.

Authorities have warned that organised crime groups are increasingly using cryptocurrencies to move funds across borders outside the traditional financial system.

Binance.US, a separate cryptocurrency exchange, said it was not affected by the security incident.

Coinbase said it was unaffected and was monitoring the situation.

In an unrelated incident earlier on Thursday, prediction market operator Polymarket temporarily halted trading after a security incident involving a third-party provider. It later resumed trading and said it would fully reimburse affected traders.

With Reuters and the Associated Press