No. Any information which could be considered as confidential should be kept as such, even with respect to your employer. If you are able to identify the person responsible for the information, it is expected that you contact him/her and return the confidential information.
You should address yourself to the relevant CERN contract manager.
The Code of Conduct applies to CERN personnel in their interactions with contractors on the CERN site. In your case, you should address yourself to the relevant CERN contract manager or the Ombuds office.