The Bitcoin Core development team has persistently worked toward enhancing the security of the protocol by addressing several critical vulnerabilities. Recent efforts included fixes by Pieter Wuille in versions 0.20.1 and 0.21.0, resolving a high-severity issue related to the management of banned IP addresses and improving the overall network security. Historical vigilance, dating back to 2015 with contributions from Wladimir J. Van Der Laan and John Newbery, underscores a consistent commitment to safeguarding Bitcoin's infrastructure. This article details the identification, resolution, and impact of various vulnerabilities, demonstrating the developers' dedication to maintaining trust and reliability in the decentralized network.