All the CCC says is that they 'acknowledge the creator', it doesn't say the Muslims worship the creator, nor that they worship the same God Catholics do.
Do you need an English translator:
"The plan of salvation also includes those who acknowledge the Creator, in the first place amongst whom are the Muslims; these profess to hold the faith of Abraham, and together with us they adore the one, merciful God, mankind's judge on the last day".
[Catechism of the Catholic Church, New York, An Image Book published by Doubleday,1994, pp 242, 243 paragraph 841]