ZachXBT Accuses Circle of Slow USDC Freezing in Major Security Incidents

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On-chain analysis by ZachXBT reveals Circle’s delayed response in freezing USDC during several major hacks since 2022. The report, titled “Circle Inaction File,” highlights incidents including Drift Protocol ($280 million), SwapNet ($16 million), and Cetus Protocol ($223 million). Similar on-chain data shows slow responses in Mango Markets, Nomad Bridge, Ledger, and GMX. ZachXBT noted faster responses from Tether and Paxos, and warned that the true scale may be larger than reported.

Odaily Planet Daily reports: On-chain detective ZachXBT has published a “Circle Inaction Archive” on X, accusing the stablecoin issuer Circle of over $420 million in potential compliance failures since 2022. According to his findings, Circle failed to promptly freeze funds in several major security incidents, including Drift Protocol (April 2026, $280 million loss), SwapNet (January 2026, $16 million loss), and Cetus Protocol (May 2025, $223 million loss). Similar delays or failures to freeze funds were also observed in incidents involving Mango Markets, Nomad Bridge, Ledger’s supply chain attack, and GMX.

In contrast, peers such as Tether and Paxos have responded more quickly in some cases. ZachXBT noted that despite Circle’s ability to freeze and blacklist assets and its oversight by U.S. regulators, it has been slow to respond to multiple law enforcement and industry requests, resulting in significant financial losses. He emphasized that the available statistics cover only publicly disclosed major incidents, and the actual scale may be even higher, raising questions about who Circle is truly serving in its compliance efforts.

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