ASA5555-K9
ASA 5500-X Series Firewalls: firewall / security appliance
Lifecycle position
Options from here
Keep it in production past the OEM cutoff with an independent maintainer.
Buy spares now, while units still circulate on the secondary market. eBay listings for ASA5555-K9 ↗
It is unsupported today. Set a migration timeline and budget.
Low-criticality role: document the risk, harden backups, retire on your terms.
Other SKUs in 5500-X Series Firewalls
Questions about ASA5555-K9
Is the Cisco ASA5555-K9 still supported?
No. Cisco's last date of support for ASA5555-K9 was Sep 2025 (per the Cisco EOL bulletin). It is past end of service life.
When did the ASA5555-K9 reach end of sale?
ASA5555-K9 reached end of sale Sep 2020, per the Cisco EOL bulletin.
What is the last date of support (EOSL) for the ASA5555-K9?
Sep 2025, per the Cisco EOL bulletin.
What is the replacement for the ASA5555-K9?
Cisco's end-of-life bulletin lists Cisco Firepower 2100 Series as the recommended migration path for this product group; the per-part-number mapping is in the linked bulletin.
Can the ASA5555-K9 be maintained after Cisco support ends?
After the last date of support, ASA5555-K9 units can often be kept in production through third-party maintenance providers. Cisco no longer issues software fixes, support, or hardware replacement for it.