**7-0: Bayern München vs Basel**, 13/03/2012, 1/16, second leg

**7-0: Bayern München vs Shakhtar Donetsk**, 11/03/2015, 1/16, second leg

Source: [UEFA.com][1]

If you include European Cups as well, then the win with the biggest margin is:

**11-0: Dinamo Bucharest vs Crusaders**, 03/10/1973 first round, second leg

Source: [theguardian.com][2]


  [1]: https://www.uefa.com/uefachampionsleague/news/newsid=2455225.html
  [2]: https://www.theguardian.com/football/2003/nov/06/theknowledge.sport