The string SSH-2.0-Cisco-1.25 is not a vulnerability itself, but rather the identifying a Cisco device's SSH service. Because this banner reveals the specific vendor and version, security scanners often flag it to suggest checking for known vulnerabilities associated with Cisco's SSH implementation.
The string SSH-2.0-Cisco-1.25 is a software version banner identifying the Secure Shell (SSH) server implementation used by a wide variety of Cisco products, including Catalyst switches ISR routers ASA firewalls ssh-2.0-cisco-1.25 vulnerability
The only true fix is to upgrade the device's firmware to a modern version of Cisco IOS or IOS-XE that supports current SSH standards (SSH v2 with AES-256 and RSA 2048-bit keys or higher). The string SSH-2
An attacker can send specific protocol messages before authenticating, exploiting a memory or logic error in how the SSH server handles early communication. An attacker can send specific protocol messages before
The most effective fix is to upgrade to a modern, patched version of Cisco software. Check the Cisco Security Advisory for your specific hardware to find the recommended "Gold Star" release. Step 2: Harden the SSH Configuration