> CVE-2026-20349 [HIGH]

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PUBLISHED
2026-08-11 17:17
MODIFIED
2026-08-11 17:17
CVSS_SCORE V3
8.6
EPSS (Prob. Exploit)
1.01%
Top 37.1%
⚠ CISA_KEV
DATA SOURCES:
NVD 🔗 2026-08-11 CISA KEV 🔗 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25

> 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.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
4.0

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-244

> CWE DETAILED DESCRIPTIONS

CWE-244: Improper Clearing of Heap Memory Before Release - The product uses realloc() to resize buffers that contain sensitive information.

> HISTORIQUE DES MODIFICATIONS

Première apparition
11/08/2026 17:17
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-244: Improper Clearing of Heap Memory Before Release ('Heap Inspection') - Using realloc() to resize buffers that store sensitive information can leave the sensitive information exposed to attack,...
Nouvelle valeur:
CWE-244: Improper Clearing of Heap Memory Before Release - The product uses realloc() to resize buffers that contain sensitive information.
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-244: Improper Clearing of Heap Memory Before Release ('Heap Inspection') - Using realloc() to resize buffers that store sensitive information can leave the sensitive information exposed to attack,...
📊 ENRICHISSEMENT 11/08/2026 20:15
KEV
Champ modifié: Catalogue KEV
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 2 days ago

> REFERENCES

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ci...
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