Yes, this is one example of an act that can come under the CDRA. However, the Claimant bears the legal burden of proving on a balance of probabilities that the cigarette smoke originated from the neighbour and that it is excessive.

For more information, you may refer to https://www.judiciary.gov.sg/civil/cases-eligible-neighbour-dispute-claim and https://www.judiciary.gov.sg/civil/before-making-an-application-protection-from-harassment