CrediX Finance Suffers $4.5 Million Exploit via Compromised Multisig Admin Access → Security

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Briefing

CrediX Finance, a real-world asset lending protocol, suffered a devastating $4.5 million exploit on August 4, 2025, merely weeks after its launch. The attack vector involved the compromise of administrative and bridge access within the protocol’s multisig wallet system, enabling an attacker to mint fake collateral tokens and subsequently drain liquidity. This incident underscores the critical need for robust access control mechanisms and highlights a recurring vulnerability trend in DeFi multisig implementations throughout 2025.

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Context

Prior to this incident, the DeFi landscape in 2025 has seen a concerning proliferation of multisig wallet failures, accounting for a significant portion of the $3.1 billion lost in exploits this year. Protocols, particularly those bridging real-world assets with decentralized finance, often retain centralized control mechanisms, such as multisig admin wallets with extensive bridge rights. This architectural choice creates an inherent attack surface, where misconfigured access or social engineering can compromise the entire system.

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Analysis

The incident began with the attacker gaining Admin and Bridge roles through CrediX Finance’s ACLManager, a critical access control component, six days before the main exploit. With these elevated privileges, the attacker leveraged the Bridge role to mint unauthorized collateral tokens directly via the CrediX Pool. These newly minted, unbacked tokens were then used to borrow $2.64 million, ultimately facilitating the draining of a total of $4.5 million from the protocol’s liquidity pool. The attacker’s operational chain included funding a wallet via Tornado Cash on Ethereum, bridging funds to the Sonic network where CrediX was hosted, executing the exploit, and then transferring the stolen assets back to Ethereum for obfuscation.

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Parameters

Protocol Targeted → CrediX Finance
Financial Impact → $4.5 Million
Attack Vector → Compromised Multisig Admin Access & Fake Collateral Minting
Blockchain(s) Affected → Sonic, Ethereum
Date of Exploit → August 4, 2025
Security Firms Involved → SlowMist, CertiK, Cyvers Alerts, Hacken

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Outlook

Immediate mitigation saw CrediX Finance taking its website offline, with a public statement indicating intent to recover funds within 24-48 hours, though no further success updates have been provided. This event reinforces the urgent call from security experts for a paradigm shift from one-time security audits to continuous, real-time, AI-driven security monitoring. Protocols must prioritize improved signer education, enhanced interface security, and the implementation of automated rule-based protections to counter the pervasive threat of multisig wallet vulnerabilities and access control failures.

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Verdict

The CrediX Finance exploit serves as a stark reminder that even nascent protocols with centralized control mechanisms remain highly susceptible to access control failures, demanding immediate and continuous security posture reinforcement across the DeFi ecosystem.

Signal Acquired from → CoinLaw