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HIGH · 8.8

CVE-2023-34139

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 Patc...

Vulnerability 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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
ZyxelUsg 2200-Vpn Firmware>= 4.20, < 5.37
ZyxelUsg 2200-Vpn-
ZyxelUsg Flex 100 Firmware>= 4.50, < 5.37
ZyxelUsg Flex 100-
ZyxelUsg Flex 100W Firmware>= 4.50, < 5.37
ZyxelUsg Flex 100W-
ZyxelUsg Flex 200 Firmware>= 4.50, < 5.37
ZyxelUsg Flex 200-
ZyxelUsg Flex 50 Firmware>= 4.50, < 5.37
ZyxelUsg Flex 50-
ZyxelUsg Flex 500 Firmware>= 4.50, < 5.37
ZyxelUsg Flex 500-
ZyxelUsg Flex 50W Firmware>= 4.50, < 5.37
ZyxelUsg Flex 50W-
ZyxelUsg Flex 700 Firmware>= 4.50, < 5.37
ZyxelUsg Flex 700-
ZyxelZywall Vpn100 Firmware>= 4.20, < 5.37
ZyxelZywall Vpn100-
ZyxelZywall Vpn2S Firmware>= 4.20, < 5.37
ZyxelZywall Vpn2S-

Related Weaknesses (CWE)

CWE-78

References

FAQ

What is CVE-2023-34139?

CVE-2023-34139 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 Patc...

How severe is CVE-2023-34139?

CVE-2023-34139 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2023-34139?

Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Usg 2200-Vpn Firmware, Zyxel Usg 2200-Vpn, Zyxel Usg Flex 100 Firmware, Zyxel Usg Flex 100, Zyxel Usg Flex 100W Firmware.