CVE-2025-13751: openvpn
CVSS: 5.5v3.1MediumAnalyzed
AliasesALPINE-CVE-2025-13751CGA-4g55-388c-q93xCGA-4hg6-mgp6-7cxqCGA-797m-rgv2-g7crCGA-83c4-frcq-2m5jCGA-874f-2q4j-grm4CGA-ccxf-9jg7-p3mvCGA-mfrc-p7vf-fvc7CGA-mgpr-3qx7-q9h3CGA-pwvm-7qmv-g9c8CGA-vj58-wxp4-p5vhCGA-w5x6-g3g9-4hf7CGA-whv8-f4vj-p4cj
Published 03-12-2025Last modified 12-12-2025
Vulnerability summary
CVE-2025-13751 is a medium (CVSS 5.5) vulnerability in openvpn. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 03-12-2025PublishedVulnerability first disclosed.
- 12-12-2025Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
6 scores · 5 sources · 2 versionsLow 1.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:ClearSources4 sources · 1.3–5.6
- OSV · WolfiEcosystem advisory · calculated5.6MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:ClearDiffers
- OSV · ChainguardEcosystem advisory · calculated5.6MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:ClearDiffers
- NVDNIST1.3LowCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Clear
Medium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- OSV · AlpineEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
0.00 pp
From 0.17% on 20-09-2026
20-09-202620-10-2026
EPSS score0.17%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-770Allocation of Resources Without Limits or ThrottlingThe product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
- CWE-775Missing Release of File Descriptor or Handle after Effective LifetimeThe product does not release a file descriptor or handle after its effective lifetime has ended, i.e., after the file descriptor/handle is no longer needed.
- CWE-841Improper Enforcement of Behavioral WorkflowThe product supports a session in which more than one behavior must be performed by an actor, but it does not properly ensure that the actor performs the behaviors in the required sequence.
Affected systems
Chainguard6 products
- openvpn< 2.6.17-r0
- openvpn-auth-pam< 2.6.17-r0
- openvpn-dev< 2.6.17-r0
- openvpn-doc< 2.6.17-r0
- openvpn-openrc< 2.6.17-r0
Wolfi6 products
- openvpn< 2.6.17-r0
- openvpn-auth-pam< 2.6.17-r0
- openvpn-dev< 2.6.17-r0
- openvpn-doc< 2.6.17-r0
- openvpn-openrc< 2.6.17-r0
Alpine1 product
- openvpn≥ 2.5.0 (No fix recorded)
Openvpn1 product
- openvpn≥ 2.5.0, ≤ 2.6.16 | ≥ 2.7_alpha1, ≤ 2.7_rc2 | ≥ 2.5.0, < 2.6.17 | 2.7:alpha1 | 2.7:alpha2 | 2.7:alpha3 | 2.7:beta1 | 2.7:beta2 | 2.7:beta3 | 2.7:rc1 | 2.7:rc2
4 vendors · 14 products
References
6 links- www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00154.htmlRelease NotesAdvisoryMailing List
- www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00153.htmlRelease NotesAdvisoryMailing List
