Risk management is an exceptionally broad field, ranging anywhere from investment portfolio risk to supply chain risk. If you have flexibility in the direction you can take your thesis, I would recommend focusing on supply chain risk management. While there is some literature related to the field (see references for examples around it), the practical applications for supply chain risk management are still fairly immature, and firms are very interested in how take the theory and apply it.
An interesting thesis topic would be an assessment of the currently available supply chain risk management tools and how well the tools are applying the applicable research in implementing said tools.
As a starting point, the major players in supply chain risk management tools today are riskmethods, Resilinc, Elementum, and Riskonnect.