Home/CVE/OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of se
CVE

CVE-2025-2704

OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of se

OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of service by corrupting and replaying network packets in the early handshake phase.

HIGH · CVSS 7.5 EPSS 0.00515
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-754Improper Check for Unusual or Exceptional Conditions
CWE-754Improper Check for Unusual or Exceptional Conditions
▤

Affected Products & Versions

1
openvpn>= 2.6.1 and <= 2.6.13
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@openvpn.net
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Apr 2025 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

4
suse-csafSUSE-SU-2025:01508-1
suse-csafSUSE-SU-2025:1508-1
suse-csafopenSUSE-SU-2025:14979-1
usnUSN-7411-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://community.openvpn.net/openvpn/wiki/CVE-2025-2704Broken Link
https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00142.html
http://www.openwall.com/lists/oss-security/2025/04/02/5Mailing List
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