CVE-2025-2704

HIGH

Published Apr 2, 2025 Modified Oct 23, 2025 CWE-754

Description

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

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-754 CWE-754

Affected Products

Vendor	Product	Versions
openvpn	openvpn	2.6.1 — 2.6.13

References

Other References

https://community.openvpn.net/openvpn/wiki/CVE-2025-2704 https://www.mail-archive.com/[email protected]/msg00142.html http://www.openwall.com/lists/oss-security/2025/04/02/5

Frequently Asked Questions

What is 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 It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-2704? +

CVE-2025-2704 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-2704? +

CVE-2025-2704 affects products from openvpn, specifically: openvpn. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-2704? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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