The Portuguese scored one of Real Madrid's goals as they won 2-0 at FC Copenhagen, taking his tally for the group stages to nine.
He was even able to miss a penalty and it not matter, with his goal putting him ahead of Hernan Crespo, Zlatan Ibrahimovic, Filippo Inzaghi and Ruud van Nistelrooy who all have eight group-stage goals to their name.
Inzaghi was a loyal foot soldier of Madrid boss Carlo Ancelotti at AC Milan and and Italian was fulsome in his praise for Ronaldo.
"I think that Inzaghi will not be happy because he has lost this record. He has gone ahead of a very strong player," Ancelotti said.
"Inzaghi was very strong in the area and Ibrahimovic is powerful and has a fantastic ability to score and assist.
"Cristiano Ronaldo is a complete forward who can score goals in every way possible. He's a bit angry about the penalty, but he scored an important goal and played very well."
Ronaldo's late penalty was a real shock, considering how metronomic he normally is in front of goal.
The damage had already been done by that stage, though, with Luka Modric's first-half curler having set Madrid on their way.
"The match went well. We were focused, had a good attitude and were in control of the match," Ancelotti added.
"I'm happy because we had a good group stage and scored lots of goals. Modric is doing well and Xabi Alonso gives us balance defensively and in attack. All of the players did well, had a good attitude and controlled the play."