A sampling of resources that identify information security threat sources and describe information technology security weaknesses, including a section that lists resources related specifically to malware, which is a significant type of security threat in and of itself.
The best information about threats and vulnerabilities is subject to constant change as the types of threats and vulnerabilities that represent the most current risks are constantly evolving. Always pursue your own study to ensure that your risk assessments sufficiently address your organization's current risks.
Resources on Threats
Ponemon Institute Study on Patient Privacy and Data Security (Subscription Required)