CVE-2005-3393

Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x allows remote clients to execute arbitrary code via format string specifiers in a push of the dhcp-option command option.

Published: 2005-11-01 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2005-3393 is rated Moderate Risk (62.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.48%). EPSS rose +1.86% over the last day, indicating growing attacker interest. 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-2005-3393

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 2026-06-15 1.62% 3.48% +1.86%
2 2025-07-16 1.65% 1.62% -0.03%
3 2025-03-30 — 1.65% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2005-3393

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2005-3393

OS Trackers for CVE-2005-3393

vendor priority summary link
debian medium CVE-2005-3393 medium 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-2005-3393
gentoo normal CVE-2005-3393: 1 GLSA(s) (200511-07), 1 atom(s) (net-misc/openvpn); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2005-3393
suse medium CVE-2005-3393 severity moderate: SUSE including 11 source package names (openvpn, openvpn-2.5.3-1.2, …), 38 product×package rows across 16 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (16 product lines)): Known Not Affected 30, Fixed 8. https://www.suse.com/security/cve/CVE-2005-3393/
ubuntu medium CVE-2005-3393 medium priority: Ubuntu including 1 source packages (openvpn), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2005-3393

Affected software / configurations for CVE-2005-3393

Vendor Product Version Raw CPE
openvpn openvpn 2.0 cpe:2.3:a:openvpn:openvpn:2.0:*:*:*:*:*:*:*
openvpn openvpn 2.0_beta11 cpe:2.3:a:openvpn:openvpn:2.0_beta11:*:*:*:*:*:*:*
openvpn openvpn_access_server 2.0.1 cpe:2.3:a:openvpn:openvpn_access_server:2.0.1:*:*:*:*:*:*:*
openvpn openvpn_access_server 2.0.2 cpe:2.3:a:openvpn:openvpn_access_server:2.0.2:*:*:*:*:*:*:*

References for CVE-2005-3393

cvelogic Threat Intelligence