CVE-2023-33011
High
Description
A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 5.10 through 5.36 Patch 2, and VPN series firmware versions 5.00 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands by using a crafted PPPoE configuration on an affected device when the cloud management mode is enabled.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Zyxel Usg 2200-vpn Firmware
PublishedJul 17, 2023
First seenJul 17, 2023
Weakness typeCWE-134CWE-134
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 | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_100_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_100w_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_200_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_50_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_500_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_50w_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_flex_700_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn100_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn2s_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn300_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn50_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn_100_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn_300_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel zywall_vpn_50_firmware | 5.00 ≤ v < 5.37 | 5.37 |
| zyxel usg_20w-vpn_firmware | 5.10 ≤ v < 5.37 | 5.37 |
| zyxel zywall_atp100_firmware | 5.10 ≤ v < 5.37 | 5.37 |
| zyxel zywall_atp100w_firmware | 5.10 ≤ v < 5.37 | 5.37 |
| zyxel zywall_atp200_firmware | 5.10 ≤ v < 5.37 | 5.37 |
| zyxel zywall_atp500_firmware | 5.10 ≤ v < 5.37 | 5.37 |
| zyxel zywall_atp700_firmware | 5.10 ≤ v < 5.37 | 5.37 |
| zyxel zywall_atp800_firmware | 5.10 ≤ v < 5.37 | 5.37 |
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