Resource allocation without limits in OpenVPN
Priority LOW 7CWE-770Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
Interactive service agent in OpenVPN version 2.5.0 through 2.6.16 and 2.7_alpha1 through 2.7_rc2 on Windows allows a local authenticated user to connect to the service and trigger an error causing a local denial of service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00177 7th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenVPN | OpenVPN | 2.5.0 – 2.6.16; 2.7_alpha1 – 2.7_rc2 | — | No fix listed | CNA |
- OpenVPN VendorOpenVPN Affected 2.5.0 – 2.6.16; 2.7_alpha1 – 2.7_rc2 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:* | 2.5.0 to before 2.6.17 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:alpha1:*:*:community:*:*:* | 2.7 alpha1 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:alpha2:*:*:community:*:*:* | 2.7 alpha2 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:alpha3:*:*:community:*:*:* | 2.7 alpha3 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:beta1:*:*:community:*:*:* | 2.7 beta1 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:beta2:*:*:community:*:*:* | 2.7 beta2 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:beta3:*:*:community:*:*:* | 2.7 beta3 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:rc1:*:*:community:*:*:* | 2.7 rc1 | Vulnerable | OpenVPN |
| cpe:2.3:a:openvpn:openvpn:2.7:rc2:*:*:community:*:*:* | 2.7 rc2 | Vulnerable | OpenVPN |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:* Versions 2.5.0 to before 2.6.17 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:alpha1:*:*:community:*:*:* Versions 2.7 alpha1 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:alpha2:*:*:community:*:*:* Versions 2.7 alpha2 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:alpha3:*:*:community:*:*:* Versions 2.7 alpha3 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:beta1:*:*:community:*:*:* Versions 2.7 beta1 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:beta2:*:*:community:*:*:* Versions 2.7 beta2 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:beta3:*:*:community:*:*:* Versions 2.7 beta3 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:rc1:*:*:community:*:*:* Versions 2.7 rc1 Vulnerable ·OpenVPN
- cpe:2.3:a:openvpn:openvpn:2.7:rc2:*:*:community:*:*:* Versions 2.7 rc2 Vulnerable ·OpenVPN
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-13751
- 2026-10-03 Alias added: GHSA-74jr-8vhj-2c3f
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-2025-13751 · CVE Program
- CVE-2025-13751 · NVD
- FIRST EPSS
- GHSA-74jr-8vhj-2c3f · GitHub Advisory Database · CC BY 4.0
- CVE-2025-13751 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences