VULNERABILITY INTELLIGENCE

CVE-2021-3547

CVSS score7.4 HIGH
EPSS probability1.24%
CISA KEVNot currently listed
Published2021-07-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

Weakness classification

  • security@openvpn.net: CWE-305
  • nvd@nist.gov: CWE-295

Primary references