No new patches, bug fixes, or security updates are produced.
If you do not have an existing ACS 5.x contract, you cannot legally download the software. For evaluation purposes, you would need to contact a Cisco partner or sales engineer for assistance or explore a migration path to Cisco ISE.
Cisco Secure ACS 5.5 has officially reached End-of-Life (EOL) and End-of-Support (EOS). Cisco terminated software support, including bug fixes and security patches, years ago. Official Cisco Software Download Portal cisco acs 55 iso download updated
Instead of attempting to keep an obsolete platform running, Cisco recommends that enterprise administrators migrate their infrastructure directly to the .
To reset a lost CLI admin password, you typically need the original installation or recovery ISO for that exact version. No new patches, bug fixes, or security updates are produced
: Cisco has removed ACS 5.x software from its official download portal because it is now considered obsolete. Security Risk
: Cisco has removed the ACS 5.5 ISO from its official download portal. Cisco Secure ACS 5
Verify you are on the highest possible patch level (5.5.0.46) to minimize known vulnerabilities. Conclusion
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