CVE-2026-20009 (GCVE-0-2026-20009)
Vulnerability from cvelistv5
Published
2026-03-04 17:06
Modified
2026-03-05 15:49
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-138 - Improper Neutralization of Special Elements
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software |
Version: 9.17.1 Version: 9.17.1.7 Version: 9.17.1.9 Version: 9.17.1.10 Version: 9.18.1 Version: 9.18.1.3 Version: 9.17.1.11 Version: 9.18.2 Version: 9.17.1.13 Version: 9.17.1.15 Version: 9.18.2.5 Version: 9.17.1.20 Version: 9.18.2.7 Version: 9.19.1 Version: 9.18.2.8 Version: 9.18.3 Version: 9.19.1.5 Version: 9.17.1.30 Version: 9.19.1.9 Version: 9.18.3.39 Version: 9.19.1.12 Version: 9.18.3.46 Version: 9.19.1.18 Version: 9.18.3.53 Version: 9.18.3.55 Version: 9.17.1.33 Version: 9.18.3.56 Version: 9.20.1 Version: 9.19.1.22 Version: 9.18.4 Version: 9.20.1.5 Version: 9.18.4.5 Version: 9.19.1.24 Version: 9.18.4.8 Version: 9.20.2 Version: 9.19.1.27 Version: 9.18.4.22 Version: 9.20.2.10 Version: 9.19.1.28 Version: 9.17.1.39 Version: 9.18.4.24 Version: 9.20.2.21 Version: 9.19.1.31 Version: 9.18.4.29 Version: 9.20.2.22 Version: 9.18.4.34 Version: 9.20.3 Version: 9.18.4.40 Version: 9.23.1 Version: 9.22.1.1 Version: 9.20.3.4 Version: 9.18.4.47 Version: 9.20.3.7 Version: 9.17.1.45 Version: 9.19.1.37 Version: 9.17.1.46 Version: 9.20.3.9 Version: 9.19.1.38 Version: 9.18.4.50 Version: 9.22.1.3 Version: 9.20.3.10 Version: 9.22.1.2 Version: 9.18.4.52 Version: 9.20.3.13 Version: 9.22.1.6 Version: 9.18.4.53 Version: 9.22.2 Version: 9.20.3.16 Version: 9.19.1.42 Version: 9.18.4.57 Version: 9.23.1.3 Version: 9.20.3.20 Version: 9.22.2.4 Version: 9.23.1.7 Version: 9.20.4 Version: 9.22.2.9 Version: 9.23.1.13 Version: 9.20.4.7 Version: 9.22.2.13 Version: 9.18.4.66 Version: 9.18.4.67 Version: 9.18.4.68 |
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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