CVEvulnerability

CVE-2021-35033

7.8 HIGH Published 2021-11-23 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-11-23
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
Weaknesses
CWE-260, CWE-287

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.

Affected configurations

• 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)

Related

Weakness · CWE (2)

  • CWE-260 Password in Configuration File weakness
  • CWE-287 Improper Authentication weakness

Referenced by CWE · observed example (4)

  • CWE-259 Use of Hard-coded Password weakness
  • CWE-284 Improper Access Control weakness
  • CWE-287 Improper Authentication weakness
  • CWE-798 Use of Hard-coded Credentials weakness

References