CVE-2023-6764

HIGH

Zyxel Atp100 Firmware < 5.37 - Format String Vulnerability

Title source: rule

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.

References (1)

[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 8.1

EPSS 0.0233

EPSS Percentile 84.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-134

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