Definition ∞ A legacy code exploit leverages vulnerabilities present in older, often unmaintained or poorly audited code within a blockchain system or smart contract. These exploits target outdated functionalities or security practices that were not addressed in subsequent updates. Such attacks capitalize on historical technical debt. This is a weakness stemming from past implementations.
Context ∞ News about legacy code exploits highlights the continuous security challenges in rapidly evolving blockchain environments, where older components may remain active. Projects often undertake comprehensive code audits and bug bounty programs to identify and remediate these vulnerabilities before they can be maliciously exploited, ensuring system integrity.