Which of the following is the BEST course of action when an information security manager...

The best course of action when an information security manager identifies that systems are vulnerable to emerging threats is to frequently update systems and monitor the threat landscape, as this will help to reduce the exposure and impact of the threats, and enable timely detection and response. Updating systems involves applying patches, fixing vulnerabilities, and implementing security controls. Monitoring the threat landscape involves collecting and analyzing threat intelligence, identifying new attack vectors and techniques, and assessing the risk and impact of the threats.

References = CISM Review Manual, 27th Edition, Chapter 4, Section 4.2.1, page 2211; State of Cybersecurity 2023: Navigating Current and Emerging Threats2; CISM Online Review Course, Module 4, Lesson 2, Topic 13