Cronos, a public chain nurtured by the cryptocurrency exchange Crypto.com, fully suspended blockchain operations on Sunday. The main reason was that Tectonic, the largest lending protocol in the ecosystem, suffered a hacker attack, with estimated losses of about $75 million. To prevent funds from continuing to leak out, the official had no choice but to take extreme measures to stop the bleeding.

Cronos is a blockchain launched by Crypto.com in 2021. It is mainly used to process on-chain transactions for its own products, significantly reducing transaction fee costs. Currently, the Cronos network primarily runs a small number of lending and trading application programs (DApps). Among them, Tectonic—the one that was attacked this time—is the largest by funding volume.

We identified an exploit in Tectonic.

The Cronos Network has been halted and we'll provide updates here

— Cronos Network (@CronosNetwork) August 30, 2026

In terms of its operating mechanism, Tectonic provides services similar to traditional finance’s “mortgage loans.” It allows users to deposit specific cryptocurrencies as collateral, and then borrow other tokens.

However, the flaw lies in the fact that Tectonic allows users to use its own native token TONIC as collateral. But at the time TONIC was attacked, the market liquidity was only about $1.34 million, with daily trading volume even lower at around $11,000. Ironically, Tectonic’s official whitepaper had already clearly warned that low-liquidity assets are prone to price manipulation—yet it has now indeed become the entry point for the attack.

On-chain data shows that the hacker used a very small amount of capital to boost the price of TONIC by nearly 100 times within just 20 minutes, and then used these artificially inflated tokens as collateral on Tectonic. Although TONIC’s collateralization ratio is set at only 20% (meaning that for every $100 worth of collateral deposited, only $20 can be borrowed), because the total valuation was exaggerated by a hundredfold, the hacker still managed to use this to extract a large amount of mainstream crypto assets with real market value.

Based on public data, the situation is nothing short of disastrous. According to DefiLlama statistics, as of August 26, the total value locked (TVL) in the Tectonic protocol was still $121 million, accounting for half of the overall DeFi market funds in the Cronos ecosystem. But by Monday, that figure had plummeted to only about $3 million.

To prevent the disaster from expanding, Cronos acted decisively. Because the blockchain’s software architecture limits the number of “validators” to 100 or fewer, the network can quickly reach consensus within minutes and force a shutdown.

This kind of “emergency unplugging” isn’t the first in the crypto world. In October 2022, when the cross-chain bridge of Binance Smart Chain (BNB Chain) was hacked, 26 validators also teamed up to pause the network, ultimately successfully intercepting and recovering $470 million out of $570 million in stolen funds.

However, the cost of this approach is that the funds of all innocent users are also forced to be frozen. From a deeper perspective, a blockchain that can be easily “shut down,” while having stronger emergency response capability, also faces certain limitations in terms of censorship resistance, neutrality, and decentralization.

What’s worth warning about is that attack methods that manipulate prices by using “low-liquidity tokens” are becoming increasingly rampant. Just last week, the Base-based lending platform Moonwell also suffered a similar attack, but because the Base chain wasn’t halted and continued producing blocks, all the funds were transferred away by the perpetrators. Also last week, the Pendle market, which has worse liquidity, only saw a slight price movement of about 3%, which was enough to trigger a chain liquidation totaling up to $36 million on the decentralized lending protocol Morpho.

Looking back at the community dynamics before Tectonic’s attack, the last public post was in May and June of this year. At the time, the official was urging users to withdraw from a certain asset and lowering the lending caps for other assets. As of Monday morning, Cronos and Tectonic officials had not yet released specific timelines for restarting the blockchain, nor had they published the exact loss amount.

“Lending protocol Tectonic suffers a $75 million hack loss! Public chain Cronos urgently shuts down to staunch the bleeding” was first published on (Block Explorer).