CVE-2023-34139
High
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.
SeverityHigh
CVSS8.8
Exploit probability55. percentile0.8%
Product
Zyxel Usg 2200-vpn Firmware
PublishedJul 17, 2023
First seenJul 17, 2023
Weakness typeCWE-78OS command injection
How to fix
Update
- zyxel usg_2200-vpn_firmware5.37 or later
- zyxel usg_flex_100_firmware5.37 or later
- zyxel usg_flex_100w_firmware5.37 or later
- zyxel usg_flex_200_firmware5.37 or later
- zyxel usg_flex_50_firmware5.37 or later
- zyxel usg_flex_500_firmware5.37 or later
- zyxel usg_flex_50w_firmware5.37 or later
- zyxel usg_flex_700_firmware5.37 or later
- zyxel zywall_vpn100_firmware5.37 or later
- zyxel zywall_vpn2s_firmware5.37 or later
- zyxel zywall_vpn300_firmware5.37 or later
- zyxel zywall_vpn50_firmware5.37 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zyxel usg_2200-vpn_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_100_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_100w_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_200_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_50_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_500_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_50w_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_700_firmware | 4.50 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn100_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn2s_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn300_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn50_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn_100_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn_300_firmware | 4.20 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn_50_firmware | 4.20 ≤ v < 5.37 | 5.37 |
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