CVE-2021-35028 Command injection in ZyWALL VPN2S Firmware
An authenticated local user can execute arbitrary OS commands via a command injection flaw in the Zyxel VPN2S firmware CGI program.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-35028?
CVE-2021-35028 is a high-severity command injection vulnerability in Zyxel ZyWALL VPN2S Firmware, published on 29 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands.
Weakness: CWE-78
Which versions are affected by CVE-2021-35028?
It affects 1 product.
Products include Zyxel Zywall Vpn2s Firmware.
How do I fix CVE-2021-35028?
No fix has been published for CVE-2021-35028 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-35028 being exploited?
There is no known exploitation of CVE-2021-35028 in the wild and no public exploit code.
Other vulnerabilities in Zyxel ZyWALL VPN2S Firmware
Sources
Also known as GHSA-qfm3-mj8g-3hm7.