This 31-minute conference talk from DevConf.IN 2025 features speakers Panga Niharika, Malaya Kumar Rout, and Goutam Tiwari discussing the critical aspects of maintaining security throughout a software's entire lifecycle. Learn how to implement best practices for long-term software maintenance, effectively identify and mitigate security risks in legacy systems, and efficiently backport security fixes. Discover how leveraging automation can streamline the security patching process while minimizing disruption to operations, ultimately leading to sustained reliability. Access additional resources and presentation slides through the provided link to enhance your understanding of building sustainable security practices.