CVE-2023-6397

MEDIUM

Zyxel ATP <5.37 Patch 1 - USG FLEX <5.37 Patch 1 - DoS

Title source: llm

Description

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1 and USG FLEX series firmware versions from 4.50 through 5.37 Patch 1 could allow a LAN-based attacker to cause denial-of-service (DoS) conditions by downloading a crafted RAR compressed file onto a LAN-side host if the firewall has the “Anti-Malware” feature enabled.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024

Scores

CVSS v3 6.5

EPSS 0.0013

EPSS Percentile 31.9%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (33)

zyxel/atp100_firmware 5.37 (2 CPE variants)

zyxel/atp100_firmware 4.32 - 5.37

zyxel/atp100w_firmware 5.37 (2 CPE variants)

zyxel/atp100w_firmware 4.32 - 5.37

zyxel/atp200_firmware 5.37 (2 CPE variants)

zyxel/atp200_firmware 4.32 - 5.37

zyxel/atp500_firmware 5.37 (2 CPE variants)

zyxel/atp500_firmware 4.32 - 5.37

zyxel/atp700_firmware 5.37 (2 CPE variants)

zyxel/atp700_firmware 4.32 - 5.37

... and 23 more

Published Feb 20, 2024

Tracked Since Feb 18, 2026