A security policy exception is a deviation from the established security policy that is granted to an individual or a group for a specific purpose or period of time. A security policy exception may be necessary when the security policy is too restrictive, outdated, or incompatible with the business requirements or objectives. However, a security policy exception also introduces a risk to the organization, as it may weaken the security posture, expose the organization to threats orvulnerabilities, or violate the compliance or regulatory obligations. Therefore, an upward trend in the number of security policy exceptions approved should be of most concern, as it indicates that the security policy is not effective or aligned with the organization’s needs and goals, and that the organization is accepting more risk than desired. The other options are not as concerning as the number of security policy exceptions approved, because they do not imply a direct or immediate risk to the organization, but rather reflect the normal or expected activities of the security management process, as explained below:

A. Number of business change management requests is a metric that measures the volume and frequency of the requests to modify the business processes, systems, or functions. An upward trend in this metric may indicate that the organization is undergoing a transformation, innovation, or improvement, which may have positive or negative impacts on the organization’s performance and security. However, this metric does not necessarily imply a risk to the organization, as the change management requests may be properly assessed, approved, and implemented, following the established change management procedures and controls.

B. Number of revisions to security policy is a metric that measures the amount and extent of the changes made to the security policy over time. An upward trend in this metric may indicate that the security policy is being updated, refined, or enhanced, which may improve or maintain the security posture and compliance of the organization. However, this metric does not necessarily imply a risk to the organization, as the revisions to the security policy may be based on the best practices, standards, and expectations for security management, and may be communicated and enforced effectively across the organization.

D. Number of changes to firewall rules is a metric that measures the number and type of the modifications made to the firewall configuration, which controls the incoming and outgoing network traffic based on predefined rules. An upward trend in this metric may indicate that the firewall is being adjusted, optimized, or customized, which may increase or decrease the firewall performance and security. However, this metric does not necessarily imply a risk to the organization, as the changes to the firewall rules may be justified, authorized, and validated,following the established firewall management procedures and controls. References = Risk and Information Systems Control Study Manual, Chapter 4, Section 4.2.1, page 115. Security Policy Exceptions: What Are They and How to Manage Them, Security Policy Exceptions: How to Handle Them in a Secure Manner, Security Policy Exceptions: A Necessary Evil?