Port3 Network has reported a security breach linked to a vulnerability in the CATERC20 cross-chain token solution provided by NEXA Network. The issue, detailed in an incident report on Port3's X platform, involves a boundary condition verification flaw. This flaw allowed unauthorized access after token ownership was relinquished, as the function returned a value of 0, matching the ownership verification condition and causing the check to fail. The vulnerability was not identified in the CATERC20 audit report, leaving Port3 tokens exposed after ownership was relinquished to enhance decentralization. The breach highlights significant oversight in the token solution's security measures, prompting concerns over the integrity of cross-chain token solutions.