CVE-2023-34139: zyxel usg_2200-vpn_firmware OS Command Injection

Vulnerability summary

CVE-2023-34139 is a high (CVSS 8.8) OS Command Injection vulnerability in zyxel usg_2200-vpn_firmware. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.4% of scored vulnerabilities.

Timeline

1. 17-07-2023
   PublishedVulnerability first disclosed.
2. 29-10-2024
   Last modifiedVulnerability information updated.

Description

A command injection vulnerability in the Free Time WiFi hotspot feature of the Zyxel USG FLEX series firmware versions 4.50 through 5.36 Patch 2 and VPN series firmware versions 4.20 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.