Binance lost approximately $6.4 billion in what is now the largest crypto exchange hack on record. Bitcoin fell roughly 3% following the news, a muted response compared to the nearly 11% drop when the exchange suffered its last major breach in 2018.
CEO Richard Teng confirmed the exchange has set aside $6.34 billion to cover losses and pledged full reimbursement to affected users. “Your assets are safe,” Teng said, detailing how the attacker exploited a self-destruct mechanism combined with an EIP-7702 delegation to bypass Binance’s normal approval controls.
How the Attacker Bypassed Security
EIP-7702, an Ethereum improvement proposal that allows externally-owned accounts to temporarily delegate signing authority to smart contracts, became the exploit vector. The attacker paired this delegation with a self-destruct function, effectively routing around the exchange’s multi-signature and approval infrastructure. It’s a new pattern. Most exchange hacks rely on compromised private keys or social engineering; using a protocol-level feature to sidestep internal guardrails is different.
Circle has already frozen $823 million in stablecoins linked to the stolen funds. The FBI and Secret Service are now working directly with Binance as investigators trace the movement of assets across chains. Cointelegraph’s live coverage noted that $3 billion in total has been frozen so far, suggesting coordination among issuers and law enforcement is moving faster than in previous mega-hacks.
Market Reaction and Reserve Strength
The 3% Bitcoin drawdown tells a story about either market maturity or reserve confidence, or both. When Binance lost $40 million in 2019, the price impact was sharper relative to the sum. This time, $6.4 billion vanished and the market barely flinched. Part of that is Binance’s immediate commitment of reserves. The exchange holds deep liquidity; $6.34 billion set aside without hesitation signals it can absorb the loss without suspending withdrawals or auctions.
Still, $6.4 billion is more than twice the size of the previous record holder, the 2022 FTX collapse’s customer shortfall, though that was insolvency rather than a technical exploit. It dwarfs the Poly Network ($611 million, returned) and Ronin ($625 million) hacks. Whether the attacker can successfully launder even a fraction of this haul is the open question. On-chain surveillance has improved; moving billions without tripping every forensics firm and exchange compliance desk is harder than it was four years ago.
Binance has survived regulatory pressure, lawsuits, and executive turnover. A $6.4 billion hole is a different test. If reserves hold and law enforcement recovers a meaningful portion, the exchange may prove more resilient than the skeptics expect. If not, the next few weeks will clarify how much of that 3% drop was confidence and how much was denial.
