Per F5 recommendations:
F5 Security Incident and Quarterly Security Notification
F5 customers are strongly recommended to ensure their TMOS is running at least 17.5.1.3 / 17.1.3 / 16.1.6.1 / 15.1.10.8. BIG-IQ 8.4 or F5 OS 1.5.4 or 1.6.4 or higher version to ensure the security of their F5 infra structure.
Please ensure you are running a compliant version per the articles above.
Use this license activation page for current F5 products.