: 5-5-0-46-1.tar.gpg (and subsequent patches).
No security patches or vulnerability updates are manufactured for this codebase. Leaving it facing active production environments invites network-wide exploitation. Official Lifecycle and Legacy Patching Reference cisco acs 55 iso download updated
This means:
: Obtaining legal, new licenses for ACS 5.5 is no longer possible through official channels. Risks of Downloading ACS 5.5 ISO from Third-Party Sites : 5-5-0-46-1