CVE-2005-3393: Openvpn

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x allows remote clients to execute arbitrary code via format string specifiers in a push of the dhcp-option command option.

Affected products

• Openvpn Openvpn: version 2.0 only; version 2.0_beta11 only
• Openvpn Openvpn Access Server: version 2.0.1 only; version 2.0.2 only

Published 2005-11-01. Last modified 2026-06-16.