Minimum connecting time (still) is 25 minutes, so 1 hour is enough (assuming the incoming flight is on time of course). You can check arrival times on the website of Vienna Int'l Airport (www.viennaairport.com) if you like. I would not worry, you are gonna make it.
The Airport in Vienna is not a big one. If your luggage is checked through you can make it!
Usually all flights should be on time but there you could be a delay .....
It's your risk anyway.
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