Cronos Halted for 10 Hours as Tectonic Exploit Drains Over $100 Million
Cronos, a Layer 1 blockchain built on the Cosmos SDK and backed by Crypto.com, experienced a prolonged halt in block production due to an exploit on the Tectonic lending protocol. The network stopped producing blocks for over 10 hours as validators worked to restore the chain's state.
According to Cronos' official X account, the network resumed block production at 23:49:01 UTC on August 30, starting from block 90,896,189, and told node operators to restart on Cronos v1.7.8 using mainnet snapshots taken at 09:52:00 UTC on Monday.
The halt resulted in the erasure of almost two hours of transactions for all users, not just the attacker. The $6.29 million already bridged to Ethereum is beyond the rollback's reach. Cronos has not addressed the trades, transfers, and liquidations made by other users during this time.
The attack exploited Tectonic's oracle and exchange-rate failure, allowing the attacker to pump TONIC and deposit it. The final transaction pulled 55.24 million USDC, 45.65 million USDT, 98.04 WBTC, 1,895.10 WETH, 16.75 million CRO, 26.24 million LCRO, and 270,650 XRP.