Canon Inc. and Ricoh Co. are warning that their network-connected copiers capable of scanning and faxing documents could be vulnerable to data leaks if they haven’t been set up correctly.

The government’s National Information Security Center plans to examine such copiers from various manufacturers used by all government offices, sources said Monday.

Documents stored in the copiers can easily be accessed by third parties via the Internet if user identifications and passwords are not set, Canon and Ricoh said.

Copiers at dozens of locations around the world can be found on a website that can search for vulnerable machines, according to an information security expert.