A material impact on the accuracy of the prior year's financial statements due to the inaccurate operation of controls is a significant issue that would likely prompt special notification from the chief audit executive (CAE) to senior management. This is because such an issue can have substantial implications for the organization's financial reporting, stakeholder trust, and compliance with regulatory requirements. Immediate notification ensures that senior management can take timely corrective action to address and remediate the issue.
Reference:
The Institute of Internal Auditors (IIA) Standards
Internal Audit Guidelines on Material Misstatements and Communication