CVE-2025-2704: openvpn
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2025-2704SUSE-SU-2025:01508-1SUSE-SU-2025:1508-1UBUNTU-CVE-2025-2704USN-7411-1DEBIAN-CVE-2025-2704openSUSE-SU-2025:14979-1
Published 02-04-2025Last modified 23-10-2025
Vulnerability summary
CVE-2025-2704 is a high (CVSS 7.5) vulnerability in openvpn. EPSS estimates a 0.83% chance of exploitation in the next 30 days, higher than 56.7% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.83%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 02-04-2025PublishedVulnerability first disclosed.
- 23-10-2025Last modifiedVulnerability information updated.
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
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.83%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
+0.01 pp
From 0.82% on 20-09-2026
20-09-202620-10-2026
EPSS score0.83%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse4 products
- openvpn-dco&distro=SUSE Linux Enterprise Module for Basesystem 15 SP6< 2.6.8-150600.3.17.1
- openvpn-dco&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 2.6.8-150600.3.17.1
- openvpn&distro=SUSE Linux Enterprise Module for Basesystem 15 SP6< 2.6.8-150600.3.17.1
- openvpn&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 2.6.8-150600.3.17.1
Opensuse3 products
- openvpn-dco&distro=openSUSE Leap 15.6< 2.6.8-150600.3.17.1
- openvpn&distro=openSUSE Leap 15.6< 2.6.8-150600.3.17.1
- openvpn&distro=openSUSE Tumbleweed< 2.6.14-1.1
Alpine1 product
- openvpn≥ 2.6.1, < 2.6.16-r0 | ≥ 2.6.1, < 2.6.14-r0
Debian1 product
- openvpn< 2.6.3-1+deb12u3 | < 2.6.14-1
Openvpn1 product
- openvpn≥ 2.6.1, ≤ 2.6.13
Ubuntu1 product
- openvpn< 2.6.12-0ubuntu0.24.04.3
6 vendors · 11 products
References
12 links- www.openwall.com/lists/oss-security/2025/04/02/5Mailing List
