The first course of action when the information security manager becomes aware that a third-party provider is not in compliance with the SOW is to assess the extent of the issue, which means determining the nature, scope, and impact of the non-compliance on the security of the enterprise's data and systems. The assessment should also identify the root cause of the non-compliance and the possible remediation actions. The assessment will help the information security manager to decide the next steps, such as notifying senior management, reporting the issue to legal personnel, initiating contract renegotiation, or terminating the contract.
References = Ensuring Vendor Compliance and Third-Party Risk Mitigation, A Risk-Based Management Approach to Third-Party Data Security, Risk and Compliance