$12.6M Freeze Sparks Fears as Circle Blacklists DeFi Contract

Add TechGaged as your preferred source on Google

See more TechGaged stories across Google News and Discover.

Add

Circle has frozen more than $12.6 million worth of USDC held inside privacy protocol Zama’s Confidential USDC (cUSDC) contract, which triggered a new debate about stablecoin issuer control over decentralized finance infrastructure. The freeze appears tied to an ongoing legal dispute involving Overnight Finance, but it’s also affected funds belonging to unrelated users whose assets were pooled within the same contract. The incident might be a potentially precedent-setting moment for DeFi composability and stablecoin censorship risk.

Why Circle Froze Zama’s cUSDC Contract

According to on-chain investigator ZachXBT’s Telegram post on May 30, Circle blacklisted Zama’s cUSDC contract on Ethereum (ETH) approximately seven hours before the disclosure, freezing 12.6 million USDC held inside the protocol.

Zama publicly documented the affected contract and it appeared on blockchain explorers. Blockchain analysis later identified a wallet that deposited roughly 12.4 million USDC into the privacy protocol on May 11.

That address appears linked to Overnight Finance, a protocol currently facing governance disputes and allegations from community members regarding treasury management. A recent governance proposal estimated that approximately $15 million of assets belonged to OVN token holders after alleged commingling between protocol and personal wallets.

What remains unclear is why Circle chose to freeze the entire contract rather than target a specific wallet. ZachXBT also claimed the Zama team doesn’t appear to have received advance notice before the execution of the blacklist action.

DeFi Faces Another Stablecoin Centralization Test

The controversy highlights one of the biggest structural vulnerabilities in decentralized finance (DeFi). Many decentralized applications (dApps) ultimately rely on centralized stablecoins that their issuers can freeze.

Unlike a standard wallet blacklist, freezing a pooled smart contract can impact every user whose assets are within that contract. In this case, funds belonging to Zama users appear to have become collateral damage in a legal dispute unrelated to the protocol itself.

ZachXBT argued that freezing a protocol contract with commingled user funds sets a significant precedent:

“(…) it’s precedent setting to unilaterally freeze the contracts / addresses of a protocol where funds have been commingled with Zama users.”

He also noted that one of the plaintiffs involved in the Overnight Finance civil case is Patagon Management, a firm known within crypto circles for pursuing aggressive DAO governance strategies:

“One of the plaintiffs responsible for the civil case against Overnight Finance is Patagon Management an entity known for hostile DAO takeovers / RFV raiding protocols.”

The event has brought back long-running discussions about whether DeFi protocols should depend on centrally controlled stablecoins such as USDC. Though Circle’s blacklist functionality complies with legal orders and law enforcement requests by design, critics argue that wide-reaching freezes can create unexpected risks for ordinary users interacting with decentralized protocols.

Meanwhile, Zama’s native token ZAMA was at press time on June 1 changing hands at $0.03346, down a whopping 10.1% on the day in the aftermath of the recent developments. At the same time, the current price still represents a 1.9% increase in the last week, and a 23.7% gain over the past month.

As of publication, neither Circle nor Zama had yet publicly explained how or when affected users might regain access to their funds.