Credentials management in ZyXEL Communications Corp. products - CVE-2021-35033
Published: November 24, 2021
Vulnerability identifier: #VU58335
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-35033
CWE-ID: CWE-255
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user can compromise the target system.
The vulnerability exists due to improper password management. A local user can dismantle and take the device, connect to it using a USB-to-UART cable and gain root access.
Affected software
NBG6818
NBG7815
WSQ20
WSQ50
WSQ60
WSR30
NBG7815
WSQ20
WSQ50
WSQ60
WSR30
How to mitigate CVE-2021-35033
Install updates from vendor's website.
NBG6818 - update to 1.00(ABSC.5)C0
NBG7815 - update to 1.00(ABSK.7)C0
WSQ20 - update to 1.00(ABOF.11)C0
WSQ50 - update to 2.20(ABKJ.7)C0
WSQ60 - update to 2.20(ABND.8)C0
WSR30 - update to 1.00(ABMY.12)C0
NBG7815 - update to 1.00(ABSK.7)C0
WSQ20 - update to 1.00(ABOF.11)C0
WSQ50 - update to 2.20(ABKJ.7)C0
WSQ60 - update to 2.20(ABND.8)C0
WSR30 - update to 1.00(ABMY.12)C0