Vulnslist

find the latest Cisco vulnerabilities

Cisco Secure Firewall Adaptive Security Appliance Software SSH Partial Private Key Authentication Bypass Vulnerability

cisco-sa-asa-ssh-keybypass-cr5xPUSf · Medium · Published · Updated

A vulnerability in the implementation of the proprietary SSH stack with SSH key-based authentication in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to log in to a Cisco Secure Firewall ASA device and execute commands as a specific user. This vulnerability is due to insufficient validation of user input during the SSH authentication phase. An attacker could exploit this vulnerability by submitting crafted input during SSH authentication to an affected device. A successful exploit could allow the attacker to log in to the device as a specific user without the private SSH key of that user. To exploit this vulnerability, the attacker must possess a valid username and the associated public key. The private key is not required. Notes: Exploitation of this vulnerability does not provide the attacker with root access. The authentication, authorization, and accounting (AAA) configuration command auto-enable is not affected by this vulnerability.   Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ssh-keybypass-cr5xPUSf This advisory is part of the March 2026 release of the Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2026 Semiannual Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication.

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2026-20009
Cisco Bug IDsCSCwq24081
CVSS ScoreBase 5.3
Base 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X
Product Names From Source
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.7, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.9, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.10, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.11, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.13, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.15, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.20, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.30, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.33, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.39, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.45, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17.1.46, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.1.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.2.5, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.2.7, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.2.8, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.3.39, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.3.46, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.3.53, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.3.55, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.3.56, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.5, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.8, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.22, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.24, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.29, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.34, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.47, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.50, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.52, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.53, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.57, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.66, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.67, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.68, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.5, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.9, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.12, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.18, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.22, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.24, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.27, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.28, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.31, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.37, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.38, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19.1.42, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.1.5, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.2.10, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.2.21, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.2.22, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.4, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.7, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.9, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.10, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.13, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.16, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3.20, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.4, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.4.7, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.1.6, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.4, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.9, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22.2.13, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.7, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23.1.13, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Firepower 2100 Series, Cisco Firepower 1000 Series, Cisco 3000 Series Industrial Security Appliances (ISA), Cisco Firepower 9000 Series, Cisco Firepower 4100 Series, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco Secure Firewall 3100 Series, Cisco Secure Firewall 4200 Series, Cisco Secure Firewall 1200 Series

Related Products

Product CVE Evidence
Cisco Secure Firewall Management Center (FMC) CVE-2026-20009 Cisco OpenVuln
Cisco Nexus Dashboard CVE-2026-20009 Cisco OpenVuln
Cisco Firepower Threat Defense Software CVE-2026-20009 Cisco OpenVuln
Cisco Catalyst PON Series Switches CVE-2026-20009 Cisco OpenVuln
Cisco Adaptive Security Appliance (ASA) Software CVE-2026-20009 Cisco OpenVuln
Cisco 3000 Series Routers CVE-2026-20009 Cisco OpenVuln
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CVE-2026-20009 Cisco OpenVuln
Cisco Secure Firewall 4200 Series CVE-2026-20009 Cisco OpenVuln
Cisco Secure Firewall 3100 Series CVE-2026-20009 Cisco OpenVuln
Cisco Secure Firewall 1200 Series CVE-2026-20009 Cisco OpenVuln
Cisco Firepower 9000 Series CVE-2026-20009 Cisco OpenVuln
Cisco Firepower 4100 Series CVE-2026-20009 Cisco OpenVuln
Cisco Firepower 2100 Series CVE-2026-20009 Cisco OpenVuln
Cisco Firepower 1000 Series CVE-2026-20009 Cisco OpenVuln
Cisco Adaptive Security Virtual Appliance (ASAv) CVE-2026-20009 Cisco OpenVuln
Cisco 3000 Series Industrial Security Appliances (ISA) CVE-2026-20009 Cisco OpenVuln