CVE-2026-40215

6.1 mediumEPSS 0.4%

Medium (6.1) in openvpn openvpn. EPSS 0.4% chance of exploitation in the next 30 days.

A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.

Severity

CVSS 4.0

6.1 medium

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L

CVSS 3.1

7.4 high

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
CWEs: CWE-125, CWE-416
Published: 2026-06-08
Modified: 2026-08-11
Record from: the NVD, synced 2026-10-19

Affected

openvpn:openvpn

References

https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026
https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026
https://community.openvpn.net/Security%20Announcements/CVE-2026-40215

Check your stack JSON