Cryptocurrency prices fell on Friday after Binance, the world’s largest crypto exchange, disclosed a major security breach. Binance told the ABC that the estimated total impact “sits at around $6.3 billion”, in US dollars, and that about $US3 billion had been frozen on-chain so far. Analytics firm Chainalysis said it could be the largest crypto heist on record, the ABC reported, citing Reuters.

What Binance says happened

In an updated statement to the ABC, Binance said: “Binance’s initial investigation suggests that the security incident may involve a compromised DevOps engineer’s laptop, which allowed an attacker to gain access to a service container and submit unauthorised withdrawal transactions.”

“We have found no evidence of any wallet private key leak,” the exchange said, adding that it would publish a detailed technical post-mortem once the investigation was complete. “Binance will cover all losses from the SAFU fund and the company’s funds. User funds are safe.”

As precautions, Binance said it had temporarily suspended deposits and withdrawals, revoked the affected address authorisation and engaged law enforcement and blockchain intelligence partners to trace and recover funds.

The market reaction

According to the ABC, citing Reuters, Bitcoin fell about 2% to a six-week low in early Asian trading, Ether fell about 2% to a two-month low, and BNB, the token originally launched as Binance Coin, was down more than 8% over 24 hours. The ABC reported that stablecoin issuers Circle and Tether said they had frozen more than $2.38 billion in their stablecoins.

Local exchanges

Australian exchange Swyftx published a note saying: “Our security team has found no evidence that Swyftx has been affected by a reported incident at multiple global exchanges. Customer funds have not been affected, and our platform is operating normally.” It also warned customers that scammers use moments like this to spread false claims, and that it would never ask for passwords, two-factor codes or seed phrases.

The bigger lesson

Binance’s own early account points to a familiar weak point: a single compromised staff device. The incident follows a string of crypto thefts. According to the ABC, researchers at TRM Labs found attackers stole $US2.9 billion of cryptocurrency across nearly 150 attacks last year.

It also highlights the difference between crypto platforms and banks. Izabella Kaminska, quoted by the ABC, put it this way: “Unlike banks, however, when these systems get hacked or become insolvent, there is no recourse to a lender of last resort or deposit insurance fund. Depositors are on their own.”

For businesses that hold digital assets or accept crypto payments, the practical steps are the same as for any cyber incident: confirm exposure through official channels only, be alert to phishing that exploits the news, and review how much is held on any single platform.

Sources: ABC News markets blog, 30 October 2026 (including Binance statements and Reuters reporting); Swyftx customer notice.