CMV format is was used in old Corel Move! application, which was eventually merged with CorelDRAW until it was removed in version 6.0. If you have access to old versions of CorelDRAW you can still make .cmv files from various source materials, including graphics. For some basic manipulation of the .cmv files you can also use the CMVParser utility.
But when it comes to direct svg to cmv conversion, this is not possible.
Updated: January 4, 2024