Blockchain technology has catalyzed a revolutionary shift toward decentralized applications, prominently exemplified by Ethereum’s introduction of smart contracts. A smart contract is a self-executing program running on the Ethereum Virtual Machine (EVM), designed to automate and ensure trust in transactions, bypassing traditional intermediaries. Nevertheless, as their adoption proliferates, inherent vulnerabilities come to the fore, thereby highlighting significant security challenges. Notably, Reentrancy attacks, underscored by the 2016 DAO hack that precipitated a staggering loss of approximately $60 million in Ether, stand out as paramount concerns. This paper offers a comprehensive review of Reentrancy attacks targeting Ethereum smart contracts. It elucidates the mechanics underpinning such attacks, pinpointing recurrent patterns and susceptibilities. Concurrently, an exploration of the trajectory of countermeasures and contemporary solutions proposed within the research sphere is undertaken. Through a detailed analysis of both the nature of attacks and the corresponding mitigation strategies, this work emphasizes potential future directions, offering invaluable insights to guide efforts in enhancing the robustness and security of Ethereum’s smart contracts