OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character.
Severity
CVSS 3.0
6.5 medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
5.5% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)