Using ssh-mitm or a custom script, the attacker can intercept a new SSH connection, present the factored private key, and transparently proxy traffic. The admin sees a normal SSH prompt, but all commands are logged.

The "Cisco125" banner is typical of older VxWorks-based firmware. If supported, upgrading to a newer firmware version (often 12.05T or later, or moving to IOS-based images if hardware permits) may change the banner string to a more generic format.

A low-privileged, authenticated attacker can use crafted syntax to gain elevated access to internal services, potentially modifying system configurations or creating new admin accounts.

Update to fixed Erlang/OTP versions or apply vendor-specific patches. Restrict SSH port access to authorized users via firewalls as a temporary mitigation. 3. Cisco IMC SSH Privilege Escalation (CVE-2025-20261)

: Full root-level access, allowing arbitrary command execution. Affected Products

This creates a 125-byte modulus (since 1000 bits / 8 = 125 bytes). The SSH daemon on these devices would then use this key for host authentication and key exchange. Critically, Cisco’s SSHv2 implementation up to version 1.25 (hence “20” referring to SSH version 2.0, release 1.25) did enforce a minimum modulus check during connection negotiation.

Ssh20cisco125 Vulnerability !!link!! Jun 2026

Using ssh-mitm or a custom script, the attacker can intercept a new SSH connection, present the factored private key, and transparently proxy traffic. The admin sees a normal SSH prompt, but all commands are logged.

The "Cisco125" banner is typical of older VxWorks-based firmware. If supported, upgrading to a newer firmware version (often 12.05T or later, or moving to IOS-based images if hardware permits) may change the banner string to a more generic format. ssh20cisco125 vulnerability

A low-privileged, authenticated attacker can use crafted syntax to gain elevated access to internal services, potentially modifying system configurations or creating new admin accounts. Using ssh-mitm or a custom script, the attacker

Update to fixed Erlang/OTP versions or apply vendor-specific patches. Restrict SSH port access to authorized users via firewalls as a temporary mitigation. 3. Cisco IMC SSH Privilege Escalation (CVE-2025-20261) If supported, upgrading to a newer firmware version

: Full root-level access, allowing arbitrary command execution. Affected Products

This creates a 125-byte modulus (since 1000 bits / 8 = 125 bytes). The SSH daemon on these devices would then use this key for host authentication and key exchange. Critically, Cisco’s SSHv2 implementation up to version 1.25 (hence “20” referring to SSH version 2.0, release 1.25) did enforce a minimum modulus check during connection negotiation.