CVE-2023-28771
Estado: AnalizadaCrítica (9.8)⚠ Explotación activa
Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 99%
- Percentil entre todas las CVEs puntuadas: 100
- Fecha de la puntuación: 29/9/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
CISA KEV — explotada activamente
- Añadida al catálogo: 31/5/2023
- Plazo de remediación: 21/6/2023
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1059Command and Scripting Interpreterexecution90 %
Vector AV:N/PR:N/UI:N + CWE-78 (OS Command Injection) en dispositivos de red Zyxel. Explotación remota sin autenticación de ejecución de comandos OS en firmware vulnerable.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (19)
Zyxel — Atp100 FirmwareZyxel — Atp100w FirmwareZyxel — Atp200 FirmwareZyxel — Atp500 FirmwareZyxel — Atp700 FirmwareZyxel — Atp800 FirmwareZyxel — USG Flex 100 FirmwareZyxel — USG Flex 100w FirmwareZyxel — USG Flex 200 FirmwareZyxel — USG Flex 500 FirmwareZyxel — USG Flex 50 FirmwareZyxel — USG Flex 50W FirmwareZyxel — USG Flex 700 FirmwareZyxel — Vpn1000 FirmwareZyxel — Vpn100 FirmwareZyxel — Vpn300 FirmwareZyxel — Vpn50 FirmwareZyxel — Zywall USG 100 FirmwareZyxel — Zywall USG 310 Firmware
CWE
- CWE-78
- CWE-78
Referencias
- http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls
- http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771
JSON original (NVD)
Mostrar
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