What is the required frequency for conducting vulnerability assessments as outlined in CIP-010 R3?

The requirement for conducting vulnerability assessments as outlined in CIP-010 R3 specifies that these assessments must be performed at least every 15 calendar months. This timeframe is established to ensure that organizations regularly review their systems and infrastructures for vulnerabilities, helping to maintain the security and resilience of critical assets. Performing these assessments within this period allows entities to identify and address potential weaknesses proactively, which is essential for protecting the reliability and security of the bulk electric system.

The selection of a 15-month interval is significant because it strikes a balance between allowing enough time for comprehensive assessments while ensuring that vulnerabilities are not overlooked for too long. Regular assessments help organizations stay up to date with changing threats and vulnerabilities in the context of evolving technologies and tactics used by adversaries.