Source: https://spacenews.com/ariane-5-ready-to-launch-esas-juice-mission-to-jupiter/

ESA is scheduled to launch JUICE on an Ariane 5 rocket on April 13, 2023. This mission will conduct science missions on Jupiter and 4 of its surrounding moons, eventually falling into the orbit of Ganymede, the largest moon in the solar system. The main goal of these missions is to see if there are any environments that might be habitable.

The JUICE spacecraft includes science instruments from multiple agencies, including ESA, NASA, JAXA, and the Isreal Space Agency. Depending on the architecture and how the trust boundaries are set up, this could have cybersecurity implications. While it is assumed that the only traffic going across the bus will be science traffic, if there is in implant on one of the instruments, it may have the ability to get information about the packets that other instruments are sending. This could have an impact on non-science missions if the same type of equipment is used.

Another cybersecurity concern is the launch vehicle. Since the Ariane 5 has been used for military and government missions, it might be possible to perform reconaissance during science missions that can later have an impact on other sectors.