This article will dissect exactly what SSH-2.0-Cisco-1.25 means, explore the real vulnerabilities tied to this SSH implementation, distinguish between myth and fact, and provide a definitive guide to remediation.
Older Cisco SSH implementations, including those that may return the 1.25 identifier, have been subject to other notable security advisories: What is Cisco-1.25 in ssh logging. ssh-2.0-cisco-1.25 vulnerability
First, let's break down the identifier.
: Continued use of CBC-mode ciphers (e.g., aes128-cbc ), which are susceptible to side-channel attacks. How to Secure Your Cisco Device This article will dissect exactly what SSH-2
A: No. Modern Cisco platforms run a completely different SSH stack (often based on OpenSSH) and report different version strings (e.g., SSH-2.0-Cisco-2.0 or SSH-2.0-OpenSSH_8.2 ). : Continued use of CBC-mode ciphers (e
: The device must be configured for RSA-based user authentication. Remote Code Execution (CVE-2025-32433)