Ssh-2.0-cisco-1.25 Vulnerability Best -

Here’s a breakdown of what’s commonly referred to in security research as the “SSH-2.0-Cisco-1.25” fingerprint, including its background, associated vulnerabilities, and how to investigate it properly.

Additional Resources

Ciphers: Continued use of CBC-mode ciphers (e.g., aes128-cbc), which are susceptible to side-channel attacks. How to Secure Your Cisco Device ssh-2.0-cisco-1.25 vulnerability

C. CVE-2015-5665 / Cisco Bug ID CSCuv12240

This banner is frequently associated with a vulnerability where the SSH server does not properly validate the state during the handshake process. Here’s a breakdown of what’s commonly referred to

Long-term:

The Risk: A Man-in-the-Middle (MitM) attacker can downgrade the connection's security by deleting specific protocol messages during the handshake without the client or server noticing. Cisco Bug ID: CSCwi61646. 2. Unauthenticated Remote Code Execution (CVE-2025-32433) including its background

• SSH-2.0 : This indicates the server supports SSH protocol version 2.0. This is the modern, secure standard (SSHv1 is deprecated).
• Cisco : The software vendor.
• 1.25 : The version string reported by the Cisco SSH server implementation.