Improper Authentication in ZyXEL Communications Corp. products - CVE-2020-28899
Published: March 6, 2021
Vulnerability identifier: #VU51246
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-28899
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests. A remote attacker can bypass authentication process by accessing certain GCI scripts directly and gain unauthorized access to the system.
Affected software
LTE7460-M608
LTE4506-M606
WAH7706
LTE4506-M606
WAH7706
How to mitigate CVE-2020-28899
Install updates from vendor's website.
LTE7460-M608 - update to 1.00 ABFR.5 C0
LTE4506-M606 - update to 1.00 ABDO.6 C0
WAH7706 - update to 1.00 ABBC.11 C0
LTE4506-M606 - update to 1.00 ABDO.6 C0
WAH7706 - update to 1.00 ABBC.11 C0