Authentication of an original equipment manufacturer entity

There is provided mechanisms for authenticating an OEM entity as manufacturer of a communication device comprising an identification module. A method is performed by a network entity. The method comprises providing, towards tire identification module, a challenge of a challenge-response authentication procedure. The method comprises obtaining, from the identification module, a first response of the challenge-response authentication procedure. The method comprises providing, towards the OEM entity and upon having obtained the response, the challenge. The method comprises obtaining, from the OEM entity, a second response of the challenge-response authentication procedure. The method comprises authenticating the OEM entity as the manufacturer of the communication device only when the second response matches the first response.