CVE-2021-3547

    Dashboard / Vulnerabilities / CVE-2021-3547

    CVE-2021-3547

    Published: 12 Jul 2021Last Modified: 8 Jul 2026

    Summary:

    Details: OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.

    References: https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements, https://community.openvpn.net/openvpn/wiki/CVE-2021-3547

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 1e6208e102ea6781710401d71fffe017658dcedf
    Fixed -None

    Affected versions

    3.6
    3.6.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-3547 | CVE-DB