Cronos

Million

Core

Tectonic

<p>The Cronos blockchain was brought to a halt on August 30 after an attacker exploited Tectonic, the chain's largest decentralized lending protocol, in a price-manipulation attack that on-chain researchers estimate caused losses of up to $75 million.</p>
<h2 id="how-the-attack-unfolded">How the Attack Unfolded</h2>
<p><cite>The attacker manipulated the price of Tectonic's TONIC governance token roughly 100x in about 20 minutes, then borrowed against the inflated collateral to drain an estimated $66 million to $75 million from the protocol.</cite><cite>Researcher Weilin Li said the attacker exploited TONIC's 20% collateral factor and thin liquidity, pumping the governance token's price 100-fold within 20 minutes before borrowing other assets.</cite><cite>Li described it as a "Mango-market style" pump-and-borrow attack.</cite></p>
<p><cite>Li initially estimated losses at approximately $66 million, but that figure later rose to roughly $75 million after another attacker-controlled address containing about $8 million was identified.</cite><cite>A separate on-chain analysis estimated approximately $119.5 million was withdrawn from affected pools during roughly 65 minutes.</cite><cite>Before the attack, Tectonic held $121.7 million in TVL and $82.7 million in active loans.</cite></p>
<h2 id="network-halt-limits-damage">Network Halt Limits Damage</h2>
<p><cite>The attacker managed to bridge only about $6 million to Ethereum before Cronos halted.</cite><cite>Cronos uses a Tendermint Core BFT consensus alongside a proof-of-authority structure with an active validator set capped at 100, which enabled validators to coordinate the emergency halt and restrict the attacker's ability to transfer additional funds beyond Cronos.</cite></p>
<p><cite>Tectonic separately warned users not to interact with the protocol while it investigated.</cite><cite>Neither project confirmed the root cause or final loss figure, and no restart timeline had been announced at the time of publication.</cite></p>
<p><cite>Crypto.com CEO Kris Marszalek said the firm's app and exchange were not compromised, and that Crypto.com's security team is assisting in the investigation.</cite><cite>As of publication, no entity has committed to repaying Tectonic depositors.</cite></p>
<p><strong>Sources:</strong><br><a href="https://www.theblock.co/news/defi/2026-08-30-crypto-com-linked-cronos-network-halts-after-tectonic-exploit-estimated-at-75-million-413069" rel="noopener noreferrer nofollow">The Block: Cronos network halts after Tectonic exploit estimated at $75 million</a><br><a href="https://blockonomi.com/cronos-network-halts-after-tectonic-price-exploit-triggers-75m-loss" rel="noopener noreferrer nofollow">Blockonomi: Cronos Network Halts After Tectonic Price Exploit Triggers $75M Loss</a><br><a href="https://beincrypto.com/cronos-halts-blockchain-tectonic-exploit/" rel="noopener noreferrer nofollow">BeInCrypto: Cronos Blockchain Stops After Reported $75 Million Hack Attempt</a></p>

Cronos Halts Network After Tectonic Exploit Hits $75M

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