Cronos Confirms $9.2M Lost in Tectonic Exploit Despite Network Rollback

Layer-1 blockchain Cronos has released an official accounting of the Tectonic exploit, confirming that $9.19 million left the network before validators could intervene. The figure comes from a post-mortem report showing manipulated collateral values generated roughly $120.4 million in fraudulent borrowing activity, of which about $111.2 million was successfully reversed through a network rollback.

Losses Exceed Earlier Estimates

The disclosure raises the confirmed scale of the exploit well above initial estimates of around $75 million. It also places the amount moved off Cronos higher than the $8.3 million previously traced to Ethereum by a blockchain analytics firm.

Attack Exploited Price Feed Through Repeated Loops

According to earlier reporting, the attacker deposited $5 million and ran a 98 cycle loop of borrowing and redepositing a thinly traded token, driving its price up nearly 300-fold and distorting Tectonic’s price feed in the process. Cronos said the exploit was detected shortly after 12:49 UTC on August 30, prompting validators to halt the network roughly two hours later. Normal operations resumed later that night once balances had been restored.