Activating Office 2013 using CMD without programs or viruses is technically possible using the KMS activation method. However, this approach raises concerns regarding legitimacy and security. Users should be aware of the potential risks and consider purchasing a legitimate copy of Office 2013 to ensure full functionality, security, and compliance with Microsoft's terms of service.

The KMS activation method works by communicating with a KMS host, which is a server that manages product keys and activation requests. When a client (in this case, Office 2013) requests activation, the KMS host verifies the product key and responds with an activation token. The client then uses this token to activate the software.