Our research objective was to analyze known vulnerabilities and exploits of several commercial off the shelf (COTS) small unmanned aircraft systems (sUAS), identify new vulnerabilities and exploits, develop risk assessments for each sUAS, and relate our findings to the Department of Defense’s use of sUASs. The first step of our research was a comprehensive literature review of known exploits and vulnerabilities of sUAS. Second, we completed penetration testing on the sUAS to identify new exploits or vulnerabilities. Utilizing risk assessment models such as the DREAD computer-security model, our team analyzed various tested COTS sUAS by applying the model to each sUAS. Finally, after identifying vulnerabilities, risk assessment scores, and countermeasures, we described the importance of the application of risk assessments to the U.S. Navy’s increasing use of sUAS for reconnaissance, surveillance, and intelligence operations.