One customer’s malicious activity impacts other tenants.

In CEH v13 Cloud Computing, multi-tenancy is a core cloud characteristic—but also a major risk if isolation controls are weak. When one tenant’s actions affect others, the issue is almost always insufficient isolation between tenants.

Multi-tenant isolation ensures that compute, storage, memory, and network resources are strictly separated. Without proper isolation, a malicious tenant can:

Exhaust shared resources

Access neighboring virtual machines

Damage the provider’s reputation

Encryption and authentication protect data access but do not stop cross-tenant impact. Logging helps detect incidents but does not prevent them.

CEH v13 emphasizes strong logical isolation mechanisms—such as hypervisor hardening and tenant segmentation—as essential cloud security controls. Therefore, Option C is the correct answer.