Wuan was believed to have fallen overboard in waters off Tanjung Kling at 11.05 pm on Sunday, the Malaysian Maritime Enforcement Agency said.
Investigations said Wuan had gone missing following a headcount and had failed to respond to announcements shortly before the ship docked in Georgetown on Monday.
Onboard CCTV footage confirmed a person falling overboard at 11.05 pm in an area which corresponded to between 9.5 nautical miles off Pulau Besar and 12 nautical miles off Tanjung Kling.
This is the second such incident in a month in waters off Malacca. Japanese sailor Atsushi Kodama, 56, reportedly fell off a merchant ship. His body was found afloat near Batu Pahat on October 30.
For reports on other cruise ship accidents see at CruiseMinus.com