Command Injection Flaw in Zyxel ATP & USG FLEX Firmware
CVE-2023-34138

8HIGH

Key Information:

Vendor

Zyxel
Status
Atp Series Firmware
Usg Flex Series Firmware
Usg Flex 50(w) Series Firmware
Usg20(w)-vpn Series Firmware
Vendor
CVE Published:
17 July 2023

What is CVE-2023-34138?

A command injection vulnerability exists in the hotspot management feature of Zyxel ATP and USG FLEX series firmware versions 4.60 to 5.36 Patch 2. This flaw allows unauthenticated, LAN-based attackers to execute arbitrary operating system commands on compromised devices. The attack is initiated if the attacker successfully persuades an authorized administrator to add their IP address to the trusted RADIUS clients list. Mitigation steps are essential to prevent exploitation of this security weakness.

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Deploy the Patch

Affected Version(s)

ATP series firmware 4.60 through 5.36 Patch 2

USG FLEX 50(W) series firmware 4.60 through 5.36 Patch 2

USG FLEX series firmware 4.60 through 5.36 Patch 2

References

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

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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