CVE-2021-35027: Zyxel Zywall VPN2S Firmware

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

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.

Affected products

• Zyxel Zywall VPN2S Firmware: version 1.12(abln.0)c0 only

Published 2021-09-29. Last modified 2026-06-17.