A network administrator needs to upgrade router software across the organization to mitigate a newly discovered security vulnerability. Before proceeding, what is the most appropriate action the administrator should take to align with best practices for network management?
Wait for an automatic update to be applied during the network's next maintenance window.
Initiate a formal change request to document and seek approval for the upgrade.
Notify the IT department about the security advisory and proceed with the upgrade.
Immediately start the upgrade on all routers to quickly mitigate any security risks.