Cosmos EVM Security Breach Triggers Emergency Shutdowns Across Multiple Chains

Cosmos EVM-based blockchain networks have been impacted by a security breach that has led to emergency shutdowns across multiple chains. On August 25, Cosmos Labs issued an urgent directive for affected chains to halt validator operations due to the ongoing security issue.

The security vulnerability exploited by attackers targeted the Cosmos EVM precompile architecture, allowing them to drain funds from compromised accounts. The TAC network was suspended after a single account was completely drained, while MANTRA successfully restarted its blockchain after 30 hours of downtime without compromising user assets.

KiiChain experienced significant financial damage, with 148,326,583.15 KII tokens stolen through 18 consecutive attacks on August 22. Cosmos Labs has not yet released aggregate loss statistics or confirmed whether a single threat actor orchestrated both attacks.