Computational capacity of modern hardware and algorithmic advances have allowed SAT solving to become a tractable technique to rely on for the decision of properties in industrial software. In this article, we present three practical applications of SAT to software security in static vulnerability checking, exploit generation, and the study of copy protections. These areas are some of the most active in terms of both theoretical research and practical solutions. Investigating the successes and failures of approaches to these problems is instructive in providing guidance for future work on the problems themselves as well as other SMT-based systems.