OpenVPN is open-source software that creates virtual private networks (VPNs). It uses encrypted connections to let users and systems access private networks over untrusted networks, such as the internet. Organizations commonly use it to provide remote access to internal services.
Because OpenVPN sits at a boundary between external users and internal resources, its security matters for identity, confidentiality, and availability. Vulnerabilities may put authentication or protected access at risk, while unpatched or misconfigured deployments can expose systems. Defenders should inventory OpenVPN installations, verify each version and vendor build against the relevant security advisory, apply the appropriate updates, and monitor access logs for unusual activity.