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

Published: 2025-04-02 Last update: 2025-10-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-2704 is rated Moderate Risk (53.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.52%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-2704

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-11 0.69% 0.52% -0.17%
2 2026-04-19 0.57% 0.69% +0.11%
3 2026-01-27 — 0.57% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-2704

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-2704

OS Trackers for CVE-2025-2704

vendor priority summary link
alpine — CVE-2025-2704: 1 source package rows (openvpn); 32 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 5, open 27. https://security.alpinelinux.org/vuln/CVE-2025-2704
debian unimportant CVE-2025-2704 unimportant priority: Debian including 1 source packages (openvpn), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-2704
suse medium CVE-2025-2704 severity moderate: SUSE including 13 source package names (openvpn, openvpn-2.6.14-1.1, …), 79 product×package rows across 28 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS, … (28 product lines)): Known Not Affected 59, Fixed 20. https://www.suse.com/security/cve/CVE-2025-2704/
ubuntu medium CVE-2025-2704 medium priority: Ubuntu including 1 source packages (openvpn), 8 status rows across 8 suites (bionic, focal, jammy, noble, oracular, trusty, upstream, xenial): not-affected 5, released 3. https://ubuntu.com/security/CVE-2025-2704

Affected software / configurations for CVE-2025-2704

Vendor Product Version Raw CPE
openvpn openvpn >= 2.6.1, <= 2.6.13 cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*

References for CVE-2025-2704

cvelogic Threat Intelligence