This research investigated cyber security education as an intervention strategy in enhancing awareness of financial cybercrimes, detection skills, and motivation toward adoption of precautionary measures in order to reduce vulnerability among Internet users in Nigeria. The study was anchored on the inoculation theory, which assumes that exposing the audience to a given risk experience or information will help create some immunity, awareness, and protection against future risks. The study used a quasi-experimental research design with 500 participants divided equally into the treatment group and control group. The treatment group was given cyber-security education training for eight weeks, while the control group was not. Both groups took a test before and after the treatment. The results were later compared, and it was revealed that participants (treatment group) that received cyber security education training demonstrated a higher awareness of financial cybercrimes, a better ability to detect the crimes, and motivation to adopt precautionary measures to reduce vulnerability compared to those participants (control group) that were not exposed to the training. The theoretical and practical implications for the findings were later presented.