Please ask your hosting company to configure your server according to this guide: http://enable-cors.org/server.html You may be able to do it yourself if they have given you sufficient permissions or if you are using a VPS or a dedicated server.
The standard says that unless you explicitly allow this, browsers should not use fonts served from a different domain.
Please also note that this is not a theme related issue and the hosting company may not allow third parties to mess around with the server configuration, hence there is not much we can do to fix this issue.