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If an upgrade to a vulnerability scanner does not create tickets for critical vulnerabilities, what is the best course of action?

  1. Make changes to the server properties due to an IP change.

  2. Reboot the server and attempt the upgrade again due to a bug.

  3. Open the ports since the scanner is on a different subnet.

  4. Roll back to the previous working backup due to application compatibility issues.

The correct answer is: Roll back to the previous working backup due to application compatibility issues.

Rolling back to the previous working backup is the best course of action in the scenario described. Operational integrity is paramount when dealing with potential vulnerabilities, as failing to detect critical vulnerabilities can leave the system exposed to attacks. By reverting to the previous backup, you can restore the vulnerability scanner to its functional state, where it was successfully identifying and creating tickets for critical vulnerabilities. This course of action allows for a safer environment while assessing and resolving any compatibility issues or bugs. It provides time to review the upgrade processes, test them in a controlled manner, and ensure that the new setup aligns with security needs. Reverting to a stable state allows the organization to maintain its security posture until a proper resolution is found and ensures that issues related to scanning capabilities do not lead to missed vulnerabilities during a crucial time.