CVE-2021-35033
HIGHZyxel NBG6818, NBG7815, WSQ20, WSQ50, WSQ60, WSR30 - Unauthenticated Root Access via Pre-Configured Password
Title source: llmDescription
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml
Exploit, Third Party Advisory x_refsource_misc
https://www.tenable.com/security/research/tra-2022-06
Scores
CVSS v3
7.8
EPSS
0.0011
EPSS Percentile
29.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-260
CWE-287
Status
published
Products (6)
zyxel/nbg6818_firmware
< 1.00\(absc.5\)c0
zyxel/nbg7815_firmware
< 1.00\(absk.7\)c0
zyxel/wsq20_firmware
< 1.00\(abof.11\)c0
zyxel/wsq50_firmware
< 2.20\(abkj.7\)c0
zyxel/wsq60_firmware
< 2.20\(abnd.8\)c0
zyxel/wsr30_firmware
< 1.00\(abmy.12\)c0
Published
Nov 23, 2021
Tracked Since
Feb 18, 2026