Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x…
Priority LOW 39Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.03478 89th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openvpn:openvpn:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.0_beta11:*:*:*:*:*:*:* | 2.0_beta11 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn_access_server:2.0.1:*:*:*:*:*:*:* | 2.0.1 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn_access_server:2.0.2:*:*:*:*:*:*:* | 2.0.2 | Vulnerable | OpenVPN |
- cpe:2.3:a:openvpn:openvpn:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.0_beta11:*:*:*:*:*:*:* Versions 2.0_beta11 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn_access_server:2.0.1:*:*:*:*:*:*:* Versions 2.0.1 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn_access_server:2.0.2:*:*:*:*:*:*:* Versions 2.0.2 Vulnerable ·OpenVPN
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2005-3393
- 2026-10-03 Alias added: GHSA-26pq-368c-c8f2
References
More Openvpn vulnerabilities
- TI-2014-04453 Unquoted Windows search path vulnerability in the ptservice service prior to… CVSS 3.1MEDIUM 5.3
- TI-2022-00467 Authentication bypass in OpenVPN CVSS 3.1CRITICAL 9.8
- TI-2024-18509 Unrestricted file upload in OpenVPN 2 CVSS 3.1CRITICAL 9.8
- TI-2024-16468 The interactive service in OpenVPN 2.6.9 and earlier allows the OpenVPN service pipe to… CVSS 3.1HIGH 7.5
- TI-2023-25309 Use after free in OpenVPN 2 CVSS 3.1CRITICAL 9.8
- TI-2024-05196 OpenVPN before 2.6.11 does not santize PUSH_REPLY messages properly which an attacker… CVSS 3.1CRITICAL 9.1
Sources
- CVE-2005-3393 · CVE Program
- CVE-2005-3393 · NVD
- FIRST EPSS
- GHSA-26pq-368c-c8f2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences