OpenVPN 2.4-2.7 Windows service bypass trusted config dir via whitelist hack
CVE-2026-63649 Published on August 14, 2026
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
Vulnerability Analysis
CVE-2026-63649 can be exploited with local system access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an Allowlist / Allow List Vulnerability?
The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses.
CVE-2026-63649 has been classified to as an Allowlist / Allow List vulnerability or weakness.
Products Associated with CVE-2026-63649
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Affected Versions
OpenVPN:- Version 2.4.0 and below 2.6.22 is affected.
- Version 2.7_alpha1 and below 2.7.6 is affected.