CVE-2023-20186: SSH20Cisco125 Vulnerability - A Critical Security Threat
), and a specific software version or internal bug ID, such as Cisco IOS XE version 12.5 , or perhaps a typo for a recent 2026 disclosure. Below is a detailed breakdown of the most critical Cisco SSH vulnerabilities active as of early 2026 that may be the intended subject: 1. Cisco Secure Firewall ASA SSH Authentication Bypass Vulnerability (CVE-2026-20009): A critical flaw in the proprietary SSH stack of Cisco Secure Firewall ASA Software Mechanism: ssh20cisco125 vulnerability exclusive
Insufficient validation of user input during the SSH authentication phase. The issue lies in parsing of the SSH