CVE Catalog

CVE-2023-34139

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.69%

48th percentile - higher than 48% of all known CVEs

Summary

CVE-2023-34139 is a command injection vulnerability in the Free Time WiFi hotspot feature of Zyxel USG FLEX and VPN devices. An unauthenticated, LAN-based attacker could execute OS commands on an affected device.

Risk Assessment

This vulnerability poses a serious security risk by allowing attackers to remotely execute commands on devices, potentially leading to full control over them.

Recommendation

It is recommended to update the firmware to the latest version to mitigate this vulnerability and implement additional security measures to restrict LAN access.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS