High severity8.0NVD Advisory· Published Jul 17, 2023· Updated Jun 17, 2026

CVE-2023-34138

Description

A command injection vulnerability in the hotspot management feature of the Zyxel ATP series firmware versions 4.60 through 5.36 Patch 2, USG FLEX series firmware versions 4.60 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.60 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.60 through 5.36 Patch 2, and VPN series firmware versions 4.60 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device if the attacker could trick an authorized administrator to add their IP address to the list of trusted RADIUS clients in advance.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Zyxel/Usg20w VPN Firmware
cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg2200 VPN Firmware
cpe:2.3:o:zyxel:usg_2200-vpn_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 100 Firmware
cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 100w Firmware
cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 200 Firmware
cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 500 Firmware
cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 50 Firmware
cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 50w Firmware
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Usg Flex 700 Firmware
cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Atp100 Firmware
cpe:2.3:o:zyxel:zywall_atp100_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Atp100w Firmware
cpe:2.3:o:zyxel:zywall_atp100w_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Atp200 Firmware
cpe:2.3:o:zyxel:zywall_atp200_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Atp500 Firmware
cpe:2.3:o:zyxel:zywall_atp500_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Atp700 Firmware
cpe:2.3:o:zyxel:zywall_atp700_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Atp800 Firmware
cpe:2.3:o:zyxel:zywall_atp800_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Vpn100 Firmware2 versions
cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:*range: >=4.60,<5.37
- cpe:2.3:o:zyxel:zywall_vpn_100_firmware:*:*:*:*:*:*:*:*range: >=4.60,<5.37
Zyxel/Zywall Vpn2s Firmware
cpe:2.3:o:zyxel:zywall_vpn2s_firmware:*:*:*:*:*:*:*:*
Range: >=4.60,<5.37
Zyxel/Zywall Vpn300 Firmware2 versions
cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:*range: >=4.60,<5.37
- cpe:2.3:o:zyxel:zywall_vpn_300_firmware:*:*:*:*:*:*:*:*range: >=4.60,<5.37
Zyxel/Zywall Vpn50 Firmware2 versions
cpe:2.3:o:zyxel:zywall_vpn50_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:zyxel:zywall_vpn50_firmware:*:*:*:*:*:*:*:*range: >=4.60,<5.37
- cpe:2.3:o:zyxel:zywall_vpn_50_firmware:*:*:*:*:*:*:*:*range: >=4.60,<5.37
Zyxel/ATP series firmwarellm-fuzzy
Range: 4.60 - 5.36 Patch 2
Zyxel/USG FLEX series firmwarellm-fuzzy
Range: 4.60 - 5.36 Patch 2
Zyxel/USG20(W)-VPN series firmwarellm-fuzzy
Range: 4.60 - 5.36 Patch 2
Zyxel/VPN series firmwarellm-fuzzy
Range: 4.60 - 5.36 Patch 2
Zyxel/ATP seriescpe-rescue
Range: 4.60 through 5.36 Patch 2
Zyxel/USG FLEX seriescpe-rescue2 versions
4.60 through 5.36 Patch 2+ 1 more
- (no CPE)range: 4.60 through 5.36 Patch 2
- (no CPE)range: 4.60 through 5.36 Patch 2
Zyxel/USG20(W)-VPN seriescpe-rescue
Range: 4.60 through 5.36 Patch 2
Zyxel/VPN seriescpe-rescue
Range: 4.60 through 5.36 Patch 2

Patches

Vulnerability mechanics

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllersnvdVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.520
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000