FR 9481 then FR 679 at Vienna
Cologne → Vienna → Bucharest
Timetable, Vienna time
13:25FR 9481 from Cologne at the gate
10:50FR 679 to Bucharest leaves the gate
21 h 25 apart on the timetable, overnight
FR 679 leaves 21 h 25 after FR 9481 arrives on the timetable: more than half a day, so not a connection we count.