This book constitutes the proceedings of the ARES 2026 EU Projects Symposium Workshops, held under the umbrella of the 21st International Conference on Availability, Reliability and Security, ARES 2026, held in Linköping, Sweden, during August 2026.

The 38 full papers presented in this book were carefully reviewed and selected from 111 submissions.

They contain papers of the following workshops:

Sixth International Workshop on Advances on Security and Privacy Technologies and Solutions (IWAPS 2026)

Ninth International Workshop on Emerging Network Security (ENS 2026)

Sixth International Workshop on Education, Training and Awareness in Cybersecurity & the Second Secure, Trustworthy, and Robust AI (ETACS/STRAI 2026)

Sixth Workshop on Security and Privacy in Intelligent Infrastructures (SP2I 2026)

Sixth International Workshop on Security Testing and Monitoring (STAM 2026)