Resolv Labs paused its protocol after an attacker minted roughly 80 million unbacked USR stablecoins on Sunday, sending USR sharply off its $1 peg and briefly pushing the token as low as $0.14. By Monday evening the Resolv Foundation said it had paused all protocol functions “to contain the impact of the exploit,” temporarily freezing Season 4 airdrop claims as well as staking and unstaking of RESOLV tokens.
Resolv maintains that the protocol’s collateral pool is intact and that no underlying assets were lost. Nevertheless, on-chain analysis shows the attacker converted most of the newly minted USR into Ether (ETH) and sold about $25 million worth. At the time of reporting, USR was trading well below its target peg, around $0.24.
The foundation issued an on-chain ultimatum to the exploiter: return 90% of the converted funds (about $25 million in ETH) and all remaining USR within 72 hours, keep the remaining 10% as a bounty, and cease activity — or face escalation. Resolv warned it would pursue coordinated asset freezes with exchanges and bridges, public tracing of funds and referrals to law enforcement if the offer was rejected. There have been no observable movements from the attacker’s main wallet since the ultimatum was posted.
Web3 security firm Cyvers’ VP of GTM and strategy, Michael Pearl, said redemptions have been reopened only for legitimate pre-exploit holders while Resolv and partner teams continue tracing “bad USR” and preparing a full post-mortem on the incident.
The event has renewed concerns about systemic risk in stablecoins, evoking memories of the 2022 Terra collapse that wiped out tens of billions and reshaped perceptions of algorithmic stablecoins. According to on-chain impact estimates cited by industry sources, the exploit triggered roughly $180 million in liquidations on lending protocol Morpho and about $334 million in outflows from the lending and liquidity platform Fluid, though overall contagion appears to have been limited so far. Analysts warn that because DeFi protocols are tightly interlinked with stablecoins, a severe failure at the stablecoin layer can threaten entire protocols or companies.
Readers are advised to independently verify details as investigations and tracing efforts continue.