CVE-2021-35027 Path traversal in ZyWALL VPN2S Firmware
A remote attacker can exploit a directory traversal flaw in the Zyxel VPN2S web server to access sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-35027?
CVE-2021-35027 is a high-severity path traversal vulnerability in Zyxel ZyWALL VPN2S Firmware, published on 29 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A directory traversal vulnerability in the web server of the Zyxel VPN2S firmware version 1.12 could allow a remote attacker to gain access to sensitive information.
Which versions are affected by CVE-2021-35027?
It affects 1 product.
Products include Zyxel Zywall Vpn2s Firmware.
How do I fix CVE-2021-35027?
No fix has been published for CVE-2021-35027 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-35027 being exploited?
There is no known exploitation of CVE-2021-35027 in the wild and no public exploit code.
Other vulnerabilities in Zyxel ZyWALL VPN2S Firmware
Sources
Also known as GHSA-gf8r-6336-2wmx.