OS Command Injection in ZyXEL Communications Corp. products - CVE-2021-35031
Published: January 3, 2022
Vulnerability identifier: #VU59128
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2021-35031
CWE-ID: CWE-78
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: ZyXEL Communications Corp.
Affected software:
GS1900-8
XGS1210-12
XGS1250-12
GS1900-8
XGS1210-12
XGS1250-12
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in the TFTP client. A local user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-35031
Install updates from vendor's website.