The Cisco ASA 5505 Adaptive Security Appliance is now obsolete (past End-of-Life and End-of-Support status).
End-of-Sale Date: 2017-08-25
End-of-Support Date: 2022-08-31
Cisco's End-of-Life Policy
You can view a listing of available Firewalls offerings that best meet your specific needs
If you want support information for the Cisco ASA 5505 Adaptive Security Appliance documentation, it may be available through Cisco.com Search or in the Cisco Community