Ssh-2.0-cisco-1.25 Vulnerability High Quality <LEGIT – 2025>

Security Report: SSH-2.0-Cisco-1.25 Vulnerability

If your security scanner flagged this banner, it is likely checking for the following vulnerabilities that commonly affect Cisco SSH implementations: SSH Terrapin Prefix Truncation Weakness - Cisco Community

In April 2025, a critical vulnerability was disclosed affecting the Erlang/OTP SSH server, which is embedded in various Cisco products and telecommunications systems. ssh-2.0-cisco-1.25 vulnerability

To mitigate and remediate this vulnerability, Cisco has released patches and workarounds. The recommended solutions are: Security Report: SSH-2

• Cisco IOS and IOS XE software
• Cisco IOS XR software
• Cisco ASA software
• Cisco Firepower Threat Defense software

Phase 4: Continuous Monitoring

The SSH banner string SSH-2.0-Cisco-1.25 indicates that the target device is running Cisco's legacy SSH implementation, typically found on older Cisco IOS, IOS-XE, or PIX/ASA software versions. This specific version string is widely associated with Cisco devices operating on older, potentially unsupported software trains. Cisco IOS and IOS XE software Cisco IOS

1. Denial of Service (DoS): An attacker can send a malicious SSH packet to the device, causing it to crash or become unresponsive.
2. Unauthorized Access: An attacker can use the vulnerability to gain unauthorized access to the device, potentially allowing them to execute arbitrary commands or access sensitive data.