Tether and Circle moved within about an hour to lock up stablecoins after roughly $3.3 billion flowed out of Binance hot wallets on Ethereum
Tether has frozen more than 1.567 billion USDT connected to what on-chain analysts are flagging as a possible exploit of Binance. The freeze followed roughly $3.3 billion in outflows from two Binance hot wallets on Ethereum on October 29, 2026.
Binance has not confirmed a breach or any actual loss.
Forty minutes, billions of dollars
The outflows happened fast. The large transfers occurred between 20:24 and 21:04 UTC, a window of about 40 minutes.
Etherscan and a number of on-chain analysts flagged the receiving addresses. They labeled them as associated with a potential hack or exploit.
Tether responded by blacklisting the wallets tied to the outflow. Reports noted an initial freeze of around $971 million, with the total later rising to more than 1.567 billion USDT.
Blacklisting works a bit like a bank cancelling a stolen card. The tokens still sit at the address, but the issuer blocks them from being sent anywhere.
Circle took similar action on its side. The USDC issuer froze approximately $823 million in USDC linked to the same activity.
Taken together, the two issuers immobilized somewhere between $1.8 billion and $2.4 billion in stablecoins. The freezes reportedly landed within about an hour of the outflows being detected.
Not everything was caught. Around $700 million in USDT and ETH reportedly moved before the blacklisting or outside its reach.
ETH has no central issuer that can flip a switch. Once it leaves a wallet, there is no off button, which makes that slice of the funds a different problem entirely.
What Binance and CZ are saying
Binance says it is investigating. The exchange has not confirmed that a hack took place or that any user funds were lost.
Former CEO Changpeng Zhao indicated the incident resembled a hack, while asserting that user funds were secure and that full coverage was expected.
Why the freeze matters
The speed of the response is the headline within the headline. Tether and Circle acted within roughly an hour of the outflows surfacing on-chain.
It also highlights a tension that never quite goes away. Stablecoins run on public blockchains, but their issuers retain the power to freeze balances at will.
What this means for traders and exchanges
Hot wallets are the connected, always-online accounts exchanges use to process withdrawals, which makes them convenient and exposed at the same time.
For stablecoin issuers, the event is something of a stress test that went their way, at least partially. Tether and Circle demonstrated they can act quickly when addresses get flagged.
The roughly $700 million that reportedly slipped through is the asterisk. It shows the limits of issuer-level freezes when attackers move fast or route funds into assets no one can blacklist.
Until then, roughly $1.8 billion to $2.4 billion in stablecoins sits frozen on-chain. It is visible to everyone and usable by no one.
