Aztec Hit by Second $2.1M Exploit in Less Than a Week, SlowMist Says

Aztec was hit by a second exploit worth $2.1 million in less than a week, according to blockchain security firm SlowMist. The incident adds to concerns around the risks that can remain in smart contracts after they are deprecated or no longer maintained.

The development matters because deprecated contracts can still hold value, interact with users, or remain accessible onchain even after a project has moved on. For crypto users and companies, that creates a lingering security surface that may not receive the same attention as active products.

SlowMist’s warning points to a broader issue in decentralized finance: code does not disappear simply because a team stops supporting it. If vulnerable contracts remain live, attackers may still be able to target them unless access is restricted, funds are removed, or other safeguards are in place.

The reported Aztec exploit also shows why security monitoring can remain important after a protocol changes direction or retires older infrastructure. In crypto markets, where smart contracts can continue operating autonomously, deprecation does not necessarily mean risk has ended.

The incident serves as another reminder for projects to manage the full lifecycle of their contracts, including what happens after a product is no longer in active use. It also underscores the need for users to be cautious when interacting with older or unsupported onchain systems.