may also be susceptible to other well-documented SSH weaknesses if not fully patched: SSH Terrapin Prefix Truncation Weakness - Cisco Community

: This is the most critical step. Immediately review Cisco's Security Advisories for affected products. Fixed software releases are typically available for download from the Cisco Software Center. It is essential to check the specific Cisco bug ID for the device in use, for example CSCvx63027.

SSH0: Exchanging versions - SSH-2.0-Cisco-1.25 SSH0: send SSH message: outdated is NULL server version string:SSH-2.0-Cisco-1.25

Immediately apply these commands to mitigate risks:

The risk level of this vulnerability is considered , as it can allow an attacker to gain unauthorized access to the device and potentially compromise the system's confidentiality, integrity, and availability.

If your vulnerability scanner flagged this banner, it is likely highlighting the (CVE-2023-48795), which affects various Cisco SSH implementations including the version identified by that banner. 🛡️ Vulnerability Report: SSH Terrapin Attack 1. Description

The SSH-2.0-Cisco-1.25 banner is a sign of potentially dangerous exposure. While it typically indicates older software, the threat is current, with thousands of devices remaining unpatched and vulnerable to remote exploitation. Organizations using Cisco equipment must prioritize scanning for this banner and applying the necessary software updates to protect their network infrastructure.

More recent research into Cisco products (as of 2025) has highlighted vulnerabilities within the Erlang/OTP SSH server implementation used by some Cisco components, which can sometimes be identified by similar SSH banners during scans. 3. Threat Landscape: Why Should You Care?

: If an attacker knew a valid local username configured for RSA authentication, a flaw in how the SSH engine parsed the key allowed entry without validating ownership of the matching private key.

The banner SSH-2.0-Cisco-1.25 is a historical marker that points to a legacy software stack that has been the source of several significant vulnerabilities. Understanding these issues is crucial for anyone maintaining older Cisco infrastructure.

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Ssh-2.0-cisco-1.25 Vulnerability //top\\ <2027>

may also be susceptible to other well-documented SSH weaknesses if not fully patched: SSH Terrapin Prefix Truncation Weakness - Cisco Community

: This is the most critical step. Immediately review Cisco's Security Advisories for affected products. Fixed software releases are typically available for download from the Cisco Software Center. It is essential to check the specific Cisco bug ID for the device in use, for example CSCvx63027.

SSH0: Exchanging versions - SSH-2.0-Cisco-1.25 SSH0: send SSH message: outdated is NULL server version string:SSH-2.0-Cisco-1.25 ssh-2.0-cisco-1.25 vulnerability

Immediately apply these commands to mitigate risks:

The risk level of this vulnerability is considered , as it can allow an attacker to gain unauthorized access to the device and potentially compromise the system's confidentiality, integrity, and availability. may also be susceptible to other well-documented SSH

If your vulnerability scanner flagged this banner, it is likely highlighting the (CVE-2023-48795), which affects various Cisco SSH implementations including the version identified by that banner. 🛡️ Vulnerability Report: SSH Terrapin Attack 1. Description

The SSH-2.0-Cisco-1.25 banner is a sign of potentially dangerous exposure. While it typically indicates older software, the threat is current, with thousands of devices remaining unpatched and vulnerable to remote exploitation. Organizations using Cisco equipment must prioritize scanning for this banner and applying the necessary software updates to protect their network infrastructure. It is essential to check the specific Cisco

More recent research into Cisco products (as of 2025) has highlighted vulnerabilities within the Erlang/OTP SSH server implementation used by some Cisco components, which can sometimes be identified by similar SSH banners during scans. 3. Threat Landscape: Why Should You Care?

: If an attacker knew a valid local username configured for RSA authentication, a flaw in how the SSH engine parsed the key allowed entry without validating ownership of the matching private key.

The banner SSH-2.0-Cisco-1.25 is a historical marker that points to a legacy software stack that has been the source of several significant vulnerabilities. Understanding these issues is crucial for anyone maintaining older Cisco infrastructure.