There currently is one option to travel by night train from Vác (Hungary) to Dresden (Germany), taking between approximately 10 and 11 hours: Namely the EN 40476. These lines are operated by ÖBB and MÁV-Start.
The Austrian Federal Railways (ÖBB) operate the Nightjet and Euronight trains (the latter together with other national railway agencies).
ÖBB night trains typically feature four types of carriages: seats, couchettes, the compact Mini Cabin, and sleepers.
Seats are for the bravest, while couchettes, Mini Cabins, and sleepers provide a more comfortable journey. In the couchettes, you can find simple and rather narrow berths. The Mini Cabin is a compact sleeping option for solo travelers – two Mini Cabins can be combined for couples. Sleepers are equipped with proper beds and sometimes even a private bathroom. Couchettes can hold up to six people. The Mini Cabin is a private space for one person – two adjacent Mini Cabins can be connected for traveling together. Sleepers are private compartments for one to three people.
Sleepers sometimes include a private bathroom or even a shower, sometimes only a sink. The Mini Cabin offers a more affordable private alternative with its own compact sleeping space for one person.
MÁV-Start, Hungary's national passenger railway, operates domestic and cross-border trains throughout the region.