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Vulnérabilité dans Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD)

août 2026

Résumé

Cisco a signalé une vulnérabilité dans Cisco Secure Firewall Adaptive Security Appliance (ASA) et Cisco Secure Firewall Threat Defense (FTD) qui peut permettre à un attaquant distant, sans authentification, de faire redémarrer l’équipement de manière inattendue, provoquant une interruption de service (DoS).

Cette faille, référencée CVE-2026-20349, concerne le traitement de requêtes HTTP liées au service Remote Access SSL VPN. Cisco indique qu’une requête spécialement conçue peut déclencher un redémarrage du boîtier de sécurité.

Solutions

Il est recommandé d’appliquer les correctifs et mesures d’atténuation indiqués par Cisco.

Details techniques

Score CVSS : 8.6

EPSS : N/A

 

Systèmes affectés

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.1.28
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.2
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.2.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.2.7
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.2.11
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.2.13
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.2.14
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.3.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.3.14
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.3.15
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 : 9.16.3.19
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.3.23
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.2.5
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.2.7
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.9
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.2.8
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.14
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.3
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 : 9.18.3.39
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.19
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.12
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.3.46
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.27
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.18
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 : 9.16.4.38
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.39
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.3.56
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.42
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.22
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.1.5
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.5
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.24
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.48
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.8
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.2
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.27
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.55
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.22
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.2.10
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.57
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.28
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.24
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.2.21
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.61
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.31
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.29
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.2.22
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.62
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.34
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.67
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.70
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.40
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.1.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.71
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.4
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.47
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.7
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.37
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.76
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.9
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.38
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.50
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.1.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.10
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.1.2
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.52
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.13
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.1.6
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.53
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.82
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.16
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.19.1.42
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.57
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.84
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.3.20
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2.4
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.7
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2.9
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.13
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.7
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2.13
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.66
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.10
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.19
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.85
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2.14
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.67
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.24.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.68
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.22
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.14
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2.20
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.71
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.19
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.26
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.89
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.2.32
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.76
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.24.1.5
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.22
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.24.1.9
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.28
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.22.3.5
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.16.4.92
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.135
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.195
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.30
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.24.1.155
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.23.1.32
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.24.1.11
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.34
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.82
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.18.4.90
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software : 9.20.4.46
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.0.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.1.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.2.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.3
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.0.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.4
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.5
Cisco Secure Firewall Threat Defense (FTD) Software : 7.3.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.3
Cisco Secure Firewall Threat Defense (FTD) Software : 7.3.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.4
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.6
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.5
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.4.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.3.1.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.6.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.5.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.6
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.6.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.1.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.7
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.5.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.3.1.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.8
Cisco Secure Firewall Threat Defense (FTD) Software : 7.6.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.8.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.6.3
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.2.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.9
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.7
Cisco Secure Firewall Threat Defense (FTD) Software : 7.7.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.2.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.10
Cisco Secure Firewall Threat Defense (FTD) Software : 7.6.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.2.3
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.8
Cisco Secure Firewall Threat Defense (FTD) Software : 7.6.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.7.10
Cisco Secure Firewall Threat Defense (FTD) Software : 7.7.11
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.8.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.6.2.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.7.10.1
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.2.4
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.10.2
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.3
Cisco Secure Firewall Threat Defense (FTD) Software : 7.6.4
Cisco Secure Firewall Threat Defense (FTD) Software : 10.0.0
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.4
Cisco Secure Firewall Threat Defense (FTD) Software : 7.0.9
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.11
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.7
Cisco Secure Firewall Threat Defense (FTD) Software : 7.4.8
Cisco Secure Firewall Threat Defense (FTD) Software : 7.2.12
Cisco Secure Firewall Threat Defense (FTD) Software : 7.7.13
Cisco Secure Firewall Threat Defense (FTD) Software : 10.0.2

 

Documentation

Référence :
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-dzv4mQFF

Nist Details CVE
https://nvd.nist.gov/vuln/detail/CVE-2026-20349

CVE Details
https://www.cvedetails.com/cve/CVE-2026-20349/

Reference CVE
https://www.cve.org/CVERecord?id=CVE-2026-20349

 

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