CVE-2021-3547

HighCVSS 7.4/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.4/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-305CWE-295

Affected software

VendorProductVersions
n/aOpenVPN 3 Core Library3.6 and 3.6.1

References

Timeline

Published
Jul 12, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-3547: High severity, CVSS 7.4 | Vulnix