For more information on the SSH-2.0-Cisco-1.25 vulnerability, including patches and workarounds, please refer to:
Older firmware distributions broadcasting this exact banner have historically introduced security defects within the user validation process.
Recent reports have identified a critical vulnerability (CVSS 10.0) in certain Cisco products using the Erlang/OTP SSH implementation. It allows unauthenticated remote code execution by sending connection protocol messages before authentication occurs. ssh-2.0-cisco-1.25 vulnerability
To determine if SSH-2.0-Cisco-1.25 indicates a vulnerable device:
Log into the device and run:
The "ssh-2.0-cisco-1.25 vulnerability" is not a single bug but rather a . It tells a story: a Cisco device deployed years ago, likely stable, and forgotten by security teams. While the banner itself does not guarantee compromise, it dramatically increases the attack surface.
Example: SSH-2.0-Cisco-1.25
: Support for diffie-hellman-group1-sha1 or diffie-hellman-group-exchange-sha1 .