Command Injection Vulnerability in Zyxel USG FLEX and VPN Series Firmware
CVE-2023-34139

8.8HIGH

Key Information:

Vendor
Zyxel
Status
Usg Flex Series Firmware
Vpn Series Firmware
Vendor
CVE Published:
17 July 2023

Summary

A command injection vulnerability exists in the Free Time WiFi hotspot feature of specific Zyxel USG FLEX and VPN series firmware versions. An attacker on the local area network could exploit this vulnerability to execute arbitrary operating system commands on an affected device without authentication, potentially compromising the integrity and confidentiality of the system.

Affected Version(s)

USG FLEX series firmware 4.50 through 5.36 Patch 2

VPN series firmware 4.20 through 5.36 Patch 2

References

https://www.zyxel.com/global/en/support/security-advisori...
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.