The 2026 EuCNC & 6G Summit builds on two successful conferences in the area of telecommunications: EuCNC, in its 35th edition, supported by the European Commission, and the 6G Summit, in its 8th edition, originated from the 6G Flagship programme in Finland, one of the very first in its area. The conference is sponsored by the IEEE Communications Society (ComSoc), the European Association for Signal Processing (EURASIP) and the European Association on Antennas and Propagation (EurAAP), and is supported by the European Commission. The conference addresses various aspects of Beyond 5G/6G communication systems and networks. It brings together cutting-edge research and world-renown industries and businesses, attracting in the last years close to 1000 delegates from more than 40 countries to present and discuss the latest results, and more than 70 exhibitors to demonstrate the technology developed in the area, with focus on research projects from EU R&I programmes.