What is CVE-2025-2704?

CVE-2025-2704 is a high-severity vulnerability in Openvpn, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2025-04-02.

How severe is CVE-2025-2704?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Openvpn

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 service by corrupting and replaying network packets in the early handshake phase

EPSS: 0.008 (53.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openvpn — versions 2.6.1

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

security@openvpn.net (vendor-advisory, Broken Link)
security@openvpn.net (release-notes)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List)

Frequently asked questions

What is CVE-2025-2704?: CVE-2025-2704 is a high-severity vulnerability in Openvpn, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2025-04-02.
How severe is CVE-2025-2704?: High severity. CVSS v3 base score is 7.5 out of 10.