This book constitutes the revised selected papers of the 14th International Conference on Critical Information Infrastructures Security, CRITIS 2019, held in Linköping, Sweden, in September 2019.

The 10 full papers and 5 short papers presented were carefully reviewed and selected from 30 submissions. They are grouped in the following topical sections: Invited Papers, Risk Management, Vulnerability Assessment, Resilience and Mitigation Short Papers, and Industry and Practical Experience Reports.