> CVE-2023-6764 [HIGH]

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PUBLISHED
2024-02-20 03:15
MODIFIED
2025-01-21 18:35
CVSS_SCORE V3
8.1
EPSS (Prob. Exploit)
0.89%
Top 40.4%
DATA SOURCES:
NVD 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-11-08

> DESCRIPTION

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration.

> AFFECTED_PRODUCTS

Zyxel - Atp200 Firmware
>= 4.32 < 5.37
Zyxel - Atp200 Firmware
Version: 5.37
Zyxel - Atp500 Firmware
>= 4.32 < 5.37
Zyxel - Atp500 Firmware
Version: 5.37
Zyxel - Atp800 Firmware
>= 4.32 < 5.37
Zyxel - Atp800 Firmware
Version: 5.37
Zyxel - Usg20 Vpn Firmware
>= 4.16 < 5.37
Zyxel - Usg20 Vpn Firmware
Version: 5.37
Zyxel - Usg20w Vpn Firmware
>= 4.16 < 5.37
Zyxel - Usg20w Vpn Firmware
Version: 5.37
Zyxel - Usg Flex 100 Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 100 Firmware
Version: 5.37
Zyxel - Usg Flex 200 Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 200 Firmware
Version: 5.37
Zyxel - Usg Flex 500 Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 500 Firmware
Version: 5.37
Zyxel - Usg Flex 100w Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 100w Firmware
Version: 5.37
Zyxel - Usg Flex 700 Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 700 Firmware
Version: 5.37
Zyxel - Atp100 Firmware
>= 4.32 < 5.37
Zyxel - Atp100 Firmware
Version: 5.37
Zyxel - Atp100w Firmware
>= 4.32 < 5.37
Zyxel - Atp100w Firmware
Version: 5.37
Zyxel - Atp700 Firmware
>= 4.32 < 5.37
Zyxel - Atp700 Firmware
Version: 5.37
Zyxel - Usg Flex 50w Firmware
>= 4.16 < 5.37
Zyxel - Usg Flex 50w Firmware
Version: 5.37
Zyxel - Usg Flex 50 Firmware
>= 4.16 < 5.37
Zyxel - Usg Flex 50 Firmware
Version: 5.37
Zyxel - Usg Flex 100ax Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 100ax Firmware
Version: 5.37
Zyxel - Usg Flex 100h Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 100h Firmware
Version: 5.37
Zyxel - Usg Flex 200h Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 200h Firmware
Version: 5.37
Zyxel - Usg Flex 200hp Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 200hp Firmware
Version: 5.37
Zyxel - Usg Flex 500h Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 500h Firmware
Version: 5.37
Zyxel - Usg Flex 700h Firmware
>= 4.50 < 5.37
Zyxel - Usg Flex 700h Firmware
Version: 5.37

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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
High (H)
Conditions spécifiques doivent être réunies 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
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> HISTORIQUE DES MODIFICATIONS

Première apparition
20/02/2024 03:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 14:46
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 1 Dernière mise à jour: 1 year ago
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