If an immediate software upgrade is not possible due to hardware limitations, apply the following configurations on the Cisco device:
SSH-2.0-Cisco-1.25 — a banner string that shows up when an SSH client probes a Cisco device — reads like a tiny mechanical signature, but it’s also an entry point into wider questions about security, disclosure, and how small protocol details can have outsized effects. ssh-2.0-cisco-1.25 vulnerability