CVE-2021-3606: Openvpn

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe).

Affected products

• Openvpn Openvpn: before 2.5.3 (fixed in 2.5.3)

Published 2021-07-02. Last modified 2026-06-17.