This white paper outlines Adobe's application security strategy, emphasizing the importance of integrating security into the development lifecycle. It describes how Adobe prioritizes secure application development through significant investments in security research and technology. The document details the Adobe Secure Product Lifecycle (SPLC), which incorporates security measures from design to deployment, ensuring that security controls are established early in the development process. The SPLC includes various security activities aimed at addressing critical application security flaws. Additionally, the paper presents the Adobe Application Security Stack, which consists of secure-by-default platforms and automated security capabilities that support product teams in building secure applications. The strategy also includes security reviews, penetration testing, and a bug bounty program to identify and mitigate vulnerabilities. By adopting these practices, Adobe aims to enhance its security posture and protect customer data effectively.