CVE-2026-20349
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability
At a glance
- Source
- NVD
- EPSS
- EPSS 1.01 % · percentile 63 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Analyzed
Description
A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Weaknesses (CWE)
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | cisco |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · psirt@cisco.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-56643
- GCVE · GCVE-0-2026-20349
CERT-FR advisories
- CERTFR-2026-AVI-1010 — Vulnérabilité dans les produits Cisco · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.1.28:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.7:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.11:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.13:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.14:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.14:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.15:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.19:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.23:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.9:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.14:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.19:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.27:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.38:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.39:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.42:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.48:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.55:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.57:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.61:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.62:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.67:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.70:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.71:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.76:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.82:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.84:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.85:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.89:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.92:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.2.5:*:*:*:*:*:*:*- +157 more
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | affected 9.16.1 ; affected 9.16.1.28 ; affected 9.16.2 ; affected 9.16.2.3 ; affected 9.16.2.7 ; affected 9.16.2.11 |
| Cisco · Cisco Secure Firewall Threat Defense (FTD) Software | affected 7.0.0 ; affected 7.0.0.1 ; affected 7.0.1 ; affected 7.0.1.1 ; affected 7.0.2 ; affected 7.2.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| CISA Known Exploited Vulnerabilities | CC0 1.0 |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |