Nexus Mutual responds to Arcadia Finance exploit, reinforcing commitment to onchain protection

Nexus Mutual, a decentralised risk protection platform that provides crypto-native cover, responded swiftly following a smart contract exploit on Arcadia Finance that occurred on July 15, which led to losses of approximately $3.6 million.

The exploit allowed an attacker to directly withdraw funds from user accounts, affecting several individuals who held cover with Nexus Mutual.

After the standard 14-day cool-down period, impacted Arcadia cover holders began filing claims on July 29. Nexus Mutual, in collaboration with OpenCover—the distribution partner responsible for selling a significant share of the affected cover on the Base chain (Ethereum Layer 2)—has already validated and paid out roughly $250,000 in claims.

“Zero risk does not exist offchain, nor will it exist onchain,” commented OpenCover CEO, Jeremiah Smith.

“Keeping users safe onchain is paramount to the overall mission and we are proud to be a part of Nexus Mutual to help scale blockchain risk transfer. The Arcadia payouts are not only about making impacted users whole, they are proof that DeFi is ready.”

Since its launch in 2019, Nexus Mutual has maintained an onchain claims process that is publicly auditable and aims to improve transparency around payouts.

To date, it has paid 100% of valid claims, often settling them within a week—noticeably faster than many traditional insurers. While delays are common in conventional claims systems, Nexus Mutual’s structure allows it to streamline decisions and payments to members without centralised bottlenecks.

“At Nexus Mutual, we pride ourselves on being there for our members when they need us the most,” said Hugh Karp, CEO of Nexus Mutual. “Too many people have had a bad experience with the traditional insurance claims process, and we’re here to show that there is a better way.”

As the Arcadia exploit highlights, risks remain present across decentralised finance. Nexus Mutual offers one approach for mitigating those risks, particularly for institutional and experienced users navigating onchain platforms. While no system is without limitations, the protocol continues to play a key role in shaping how DeFi participants approach smart contract risk.