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Vulnerability record · CVE-2017-7478 · published 15 May 2017

CVE-2017-7478: Openvpn improper input validation vulnerability

Openvpn · Openvpn

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.

7.5 CVSS 3.0 High EPSS 14% · top 3.6% CWE-617 · CWE-617CWE-20 · Improper input validation
7.5CVSS 3.0 base score, v2 5.0
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/98444
http://www.securitytracker.com/id/1038473
https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits Vendor Advisory
https://www.exploit-db.com/exploits/41993/
http://www.securityfocus.com/bid/98444
http://www.securitytracker.com/id/1038473
https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits Vendor Advisory
https://www.exploit-db.com/exploits/41993/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-7478), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.