Cosmos EVM bug exploited in multichain theft; Cosmos Labs reports losses across six networks

AI Market Summary
Cosmos Labs reported a multichain theft across six networks after attackers exploited an integer underflow in Cosmos EVM, allowing balances to wrap to extremely large values. Roughly $5.7m in assets were swapped via DEXs and CEXs, with some CEX accounts reportedly frozen. The incident raises near-term security and integration risk for Cosmos EVM-based applications and could pressure liquidity and risk appetite across the ecosystem.
Impact level
● Medium
Affected assets
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AI Insight · ATOM/USDTAI Insight
▼ Bearish
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Cosmos Labs said attackers siphoned funds from six blockchain networks between Aug. 20 and Aug. 25 after exploiting an integer underflow vulnerability in Cosmos EVM, a shared software stack used to run Ethereum-style applications. The flaw could cause token balances to wrap around to an extremely large value. Cosmos Labs estimates roughly $2.87 million in stolen assets was swapped via decentralized exchanges, while another $2.85 million was routed through centralized exchanges. The centralized exchange accounts tied to the incident have reportedly been frozen as the investigation continues.