This book constitutes the refereed proceedings of the 12th EAI International Conference on Industrial Networks and Intelligent Systems, INISCOM 2026, held in Da Nang, Vietnam, during February 26–27, 2026.

The 17 full papers included in this book were carefully reviewed and selected from 46 submissions. They were organized into the following topical sections: Industrial Networks and Intelligent Systems; Telecommunications Systems and Networks; Information Processing and Data Analysis; and Security and Privacy.