CubETH is a cooperative Swiss CubeSat mission to demonstrate new technologies in the area of Global Navigation Satellite System (GNSS)-bascd navigation and the usage of COTS components. The satellite will carry five GNSS patch antennas, each connected to two independent u-blox multi-GNSS receivers. These very small, commercially available low-cost receivers are able to track single-frequency code and phase data of all the major GNSS, i.e. GPS, GLONASS, QZSS, Beidou (and ready for Galileo). Four main science objectives have been defined for the CubETH mission: (1) precise orbit determination using low-cost GNSS receivers, (2) attitude determination based on very short baselines, (3) comparison of the performance in space between GPS and GLONASS (and possibly other GNSS) as an important step for farther developments of space-bome GNSS receivers, (4) additional experimental measurements (e.g. for air density estimation during re-entry). The satellite will carry 3 retro-reflectors to enable satellite laser ranging for performance validation of the precise orbit determination. Novel CubeSat technologies will also be tested. We will take into account lessons learned from the SwissCube mission, which is in operation since 2009. A new modular design for the structure as well as connectors will be flown. We also intend to demonstrate the use of a miniaturized low-power command and data handling system, which shall control the satellite. In this paper, we will present the reasons for new technologies, based on our experience with SwissCube. In this paper, we will discuss the current status of the main concepts for the CubETH spacecraft and its payload.