CVE-2021-35033
High
Description
A vulnerability in specific versions of Zyxel NBG6818, NBG7815, WSQ20, WSQ50, WSQ60, and WSR30 firmware with pre-configured password management could allow an attacker to obtain root access of the device, if the local attacker dismantles the device and uses a USB-to-UART cable to connect the device, or if the remote assistance feature had been enabled by an authenticated user.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Zyxel Nbg6818 Firmware
PublishedNov 23, 2021
First seenNov 23, 2021
Weakness typeCWE-260CWE-260
How to fix
Update
- zyxel nbg6818_firmware1.00\(absc.5\)c0 or later
- zyxel nbg7815_firmware1.00\(absk.7\)c0 or later
- zyxel wsq20_firmware1.00\(abof.11\)c0 or later
- zyxel wsq50_firmware2.20\(abkj.7\)c0 or later
- zyxel wsq60_firmware2.20\(abnd.8\)c0 or later
- zyxel wsr30_firmware1.00\(abmy.12\)c0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zyxel nbg6818_firmware | v < 1.00\(absc.5\)c0 | 1.00\(absc.5\)c0 |
| zyxel nbg7815_firmware | v < 1.00\(absk.7\)c0 | 1.00\(absk.7\)c0 |
| zyxel wsq20_firmware | v < 1.00\(abof.11\)c0 | 1.00\(abof.11\)c0 |
| zyxel wsq50_firmware | v < 2.20\(abkj.7\)c0 | 2.20\(abkj.7\)c0 |
| zyxel wsq60_firmware | v < 2.20\(abnd.8\)c0 | 2.20\(abnd.8\)c0 |
| zyxel wsr30_firmware | v < 1.00\(abmy.12\)c0 | 1.00\(abmy.12\)c0 |
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