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Cronos restarts and restores production after Tectonic exploit halt

Cronos said the restarted chain was producing blocks from block 90,896,189 and some services like RPC providers, explorers, and bridges could take longer to recover.

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Cronos has restarted and restored block production after validators reverted the chain to its state before the Tectonic exploit, replacing an open-ended network halt with a monitored restart, according to CryptoSlate. In an Aug. 31 update, the network said the restarted chain was producing blocks from block 90,896,189, with a timestamp of 23:49:01 UTC on Aug. 30, and that it was fully back online.

CryptoSlate reports that Cronos said some parts of the ecosystem could lag the restart. The network noted that certain protocols, RPC providers, explorers, and bridges might take longer to recover, while it monitors the chain for stability and plans to publish a full postmortem.

Cronos announced the halt on Aug. 30 after identifying an exploit involving Tectonic, a decentralized lending protocol running on the chain, making the wider blockchain unavailable while security teams assessed the incident. Tectonic separately acknowledged an incident and told users not to interact with the protocol until it could confirm that it was safe, CryptoSlate said.

Onchain researcher Weilin Li attributed the exploit to manipulation of TONIC, Tectonic's thinly traded governance token. CryptoSlate writes that Li estimated the attacker inflated TONIC's price and used it as collateral to borrow other assets, with estimates moving from about $66 million to roughly $75 million, while only about $6 million was bridged to Ethereum before the halt, though CryptoCronos and Tectonic have not published a confirmed loss or official root-cause analysis.

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