Smart contracts, as self-executing agreements with predefined conditions written in code, have gained significant traction in various industries, particularly within blockchain networks. However, their widespread adoption has raised concerns about security vulnerabilities and potential exploits. This paper presents a thorough examination of smart contract security within network environments, aiming to provide a holistic understanding of the associated risks and mitigation strategies. We review common security threats, such as reentrancy attacks and transaction ordering dependence, and explore techniques for enhancing smart contract security, including formal verification and code auditing. Additionally, we analyze the role of consensus mechanisms and network architecture in safeguarding smart contracts against malicious actors. Through this comprehensive analysis, we aim to contribute to the ongoing efforts to strengthen the security posture of smart contracts in blockchain ecosystems.