Aztec Suffers Second Major Security Breach Within Week as Hackers Drain $2.1 Million

Aztec Labs confirmed a second security breach in days, with attackers exploiting a legacy bridge connected to its private rollup infrastructure and stealing over $2.1 million in cryptocurrency. The attack targeted an immutable smart contract tied to a discontinued 2022 product and was unrelated to the earlier exploit that occurred just days prior. The incidents have sparked renewed warnings about the dangers of deprecated smart contracts that remain accessible and hold active user funds.

Why it matters: Multiple breaches at a major Layer 2 protocol within one week underscores critical infrastructure vulnerabilities in the crypto ecosystem and raises urgent questions about smart contract lifecycle management—issues that directly impact the security posture and user trust of the entire DeFi landscape.