CVE-2025-2704

EUVD-2025-9571
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
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADPADP
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 68%
Affected Products (NVD)
VendorProductVersion
openvpnopenvpn
2.6.1 ≤
𝑥
≤ 2.6.13
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
openvpn
bookworm
2.6.3-1+deb12u4
fixed
bookworm (security)
2.6.3-1+deb12u4
fixed
bullseye
2.5.1-3
not-affected
bullseye (security)
2.5.1-3+deb11u2
fixed
forky
2.7.0-1
fixed
sid
2.7.0-1
fixed
trixie
2.6.14-1+deb13u1
fixed
trixie (security)
2.6.14-1+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
openvpn
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
Fixed 2.6.12-0ubuntu0.24.04.3
released
oracular
Fixed 2.6.12-1ubuntu1.2
released
trusty
not-affected
xenial
not-affected
Common Weakness Enumeration
References
https://community.openvpn.net/openvpn/wiki/CVE-2025-2704
https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00142.html
http://www.openwall.com/lists/oss-security/2025/04/02/5