The Portugal superstar, 33, netted inside the opening five minutes of his side's World Cup clash at the Luzhniki Stadium on Wednesday.
Ronaldo has now scored more international goals than any other European player in history following his 85th effort on the international stage.
Ronaldo followed up his stunning hat-trick against Spain on matchday one by breaking the European record in what is the latest achievement of his remarkable career.
He has also become the first Portugal player since Jose Torres in 1966 to score a goal with his right foot, left foot and head in a single World Cup tournament.
Ronaldo had previously struggled at the World Cup but the five-time Ballon d'Or winner has flown out of the blocks in the 2018 edition so far.
85 - Cristiano Ronaldo has now scored more international goals than any other European player in the history of football (85 goals for Portugal). Historic. #POR #MAR #PORMAR #Ronaldo #WorldCup pic.twitter.com/I3wsEJTGlQ — OptaJoe (@OptaJoe) June 20, 2018
He currently leads the way in the race for the 2018 World Cup Golden Boot, with four strikes to his name.
Ronaldo scored his first international goal for Portugal all the way back in 2004 in a 2-1 defeat against Greece at the European Championship.