The cryptocurrency community is facing fresh questions about centralization and asset control after stablecoin issuer Circle froze $12.6 million in USDC tokens. The funds were pegged to a confidential smart contract belonging to the privacy protocol Zama. According to renowned onchain investigator ZachXBT, the exact motivations behind the sudden freeze remain unclear, though it is highly likely tied to an ongoing civil court case that is entirely unrelated to the platform’s everyday users.
The move has sent ripples through the decentralized finance space, largely because it highlights the vulnerabilities users face when interacting with centralized stablecoins on privacy-focused networks. ZachXBT noted that the targeted smart contract was publicly identified on various block explorers and clearly documented in Zama’s technical papers, yet the protocol’s team reportedly received no prior warning from Circle before the funds were locked.
The Overnight Finance Connection and Commingled Funds
A deeper look into the blockchain data reveals a complex web leading up to the freeze. On May 11, 2026, wallets associated with the decentralized finance platform Overnight Finance deposited a staggering $12.4 million into the Zama protocol. This massive transfer occurred shortly after an intense governance vote within the Overnight Finance community, which was triggered by serious allegations from token holders that the founding team was attempting to execute a rug pull with treasury funds.
Because Zama operates as a privacy-centric protocol, the sudden influx of these highly contested funds became instantly commingled with the assets of everyday Zama users. By unilaterally freezing the entire smart contract, Circle has established a highly controversial precedent. It essentially means that the assets of innocent users have become collateral damage simply because their funds shared the same digital space as the disputed Overnight Finance deposits. For many in the decentralized finance space, this lack of communication and broad-stroke approach to freezing commingled assets represents a major overstep.
Circle Faces Backlash Over Inconsistent Security Policies
This recent freeze has reignited intense criticism regarding how Circle chooses to police its network. The stablecoin issuer has repeatedly found itself in the hot seat for its seemingly contradictory enforcement actions. In March, ZachXBT pointed out that Circle wrongfully froze 16 stablecoin wallets tied to legitimate cryptocurrency exchanges and online casinos. Those freezes were also linked to ongoing civil disputes in the United States, despite the targeted businesses having no clear connection to the legal conflicts.
The frustration within the community is magnified by Circle’s historical failure to act when actual crimes occur. According to data compiled by ZachXBT, the company has failed to freeze approximately $420 million across 15 separate hacking and fraud incidents since 2022. The most glaring example is the catastrophic Drift Protocol hack in April 2026. Despite having a critical six-hour window to intercept $232 million in stolen user funds as they moved through Circle’s Cross-Chain Transfer Protocol bridge, the company took no action. This glaring inconsistency has not only damaged Circle’s reputation but has also resulted in a massive class-action lawsuit from users demanding accountability for the platform’s failure to protect them from malicious actors.
