CVE-2026-13122

5.9 mediumEPSS 0.5%

Medium (5.9) in openvpn openvpn. EPSS 0.5% chance of exploitation in the next 30 days.

OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled

Severity

CVSS 4.0

5.9 medium

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

CVSS 3.1

5.3 medium

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
CWE: CWE-617
Published: 2026-07-06
Modified: 2026-07-09
Record from: the NVD, synced 2026-10-19

Affected

openvpn:openvpn

References

https://community.openvpn.net/Security%20Announcements/CVE-2026-13122

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