On 1st May this year, I found it was possible to dump the names, addresses, emails, usernames, and phone numbers of every single user of every single company who had registered on the CSL M2M SIM page. I did not push the investigation any further, but worse may have been visible.
http://cybergibbons.com/alarms-2/customer-database-leak-on-csl-dualcoms-sim-registration-portal/
If you would like to know if your company was one of the listed ones, I can check for you.