CVE-2025-13086 (GCVE-0-2025-13086)
Vulnerability from cvelistv5 – Published: 2025-12-03 19:54 – Updated: 2025-12-12 13:50
VLAI
EPSS
VEX
Summary
Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://community.openvpn.net/Security%20Announce… | vendor-advisory |
| https://www.mail-archive.com/openvpn-announce@lis… | release-notes |
| https://www.mail-archive.com/openvpn-announce@lis… | release-notes |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-13086",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-03T21:48:54.419203Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-12-03T21:49:07.801Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "OpenVPN",
"vendor": "OpenVPN",
"versions": [
{
"lessThanOrEqual": "2.6.15",
"status": "affected",
"version": "2.6.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "2.7_rc1",
"status": "affected",
"version": "2.7_alpha1",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client"
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 4.6,
"baseSeverity": "MEDIUM",
"exploitMaturity": "UNREPORTED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-940",
"description": "CWE-940: Improper Verification of Source of a Communication Channel",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-12-12T13:50:46.678Z",
"orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
"shortName": "OpenVPN"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://community.openvpn.net/Security%20Announcements/CVE-2025-13086"
},
{
"tags": [
"release-notes"
],
"url": "https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html"
},
{
"tags": [
"release-notes"
],
"url": "https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00151.html"
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
"assignerShortName": "OpenVPN",
"cveId": "CVE-2025-13086",
"datePublished": "2025-12-03T19:54:10.737Z",
"dateReserved": "2025-11-12T19:37:55.606Z",
"dateUpdated": "2025-12-12T13:50:46.678Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-13086",
"date": "2026-08-05",
"epss": "0.00627",
"percentile": "0.46623"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-13086\",\"sourceIdentifier\":\"security@openvpn.net\",\"published\":\"2025-12-03T20:16:24.353\",\"lastModified\":\"2026-06-17T08:33:29.060\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client\"}],\"affected\":[{\"source\":\"security@openvpn.net\",\"affectedData\":[{\"vendor\":\"OpenVPN\",\"product\":\"OpenVPN\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"2.6.0\",\"lessThanOrEqual\":\"2.6.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"2.7_alpha1\",\"lessThanOrEqual\":\"2.7_rc1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security@openvpn.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:X\",\"baseScore\":4.6,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"UNREPORTED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-12-03T21:48:54.419203Z\",\"id\":\"CVE-2025-13086\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@openvpn.net\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-940\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*\",\"versionStartIncluding\":\"2.6.0\",\"versionEndExcluding\":\"2.6.16\",\"matchCriteriaId\":\"61429F75-3DE9-499D-B00B-407E476A7B0F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:alpha1:*:*:community:*:*:*\",\"matchCriteriaId\":\"474A2F74-9D40-437D-B71A-43A8A26C2A55\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:alpha2:*:*:community:*:*:*\",\"matchCriteriaId\":\"1F5B810E-3614-4332-9281-B2AA28BD9403\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:alpha3:*:*:community:*:*:*\",\"matchCriteriaId\":\"2A423301-191A-4578-B824-22024A225C1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:beta1:*:*:community:*:*:*\",\"matchCriteriaId\":\"537BC1B1-7E25-48A0-9750-443E6774FD97\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:beta2:*:*:community:*:*:*\",\"matchCriteriaId\":\"387E2C7F-C16A-49FA-827B-642BA760320D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:beta3:*:*:community:*:*:*\",\"matchCriteriaId\":\"183C57B8-5F1E-44E8-8B8A-5FBCDB926F21\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openvpn:openvpn:2.7:rc1:*:*:community:*:*:*\",\"matchCriteriaId\":\"113A4E81-FF15-4E70-8DE5-E82AA3FB1D79\"}]}]}],\"references\":[{\"url\":\"https://community.openvpn.net/Security%20Announcements/CVE-2025-13086\",\"source\":\"security@openvpn.net\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00151.html\",\"source\":\"security@openvpn.net\",\"tags\":[\"Mailing List\",\"Release Notes\"]},{\"url\":\"https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html\",\"source\":\"security@openvpn.net\",\"tags\":[\"Mailing List\",\"Release Notes\"]}]}}",
"redhat_vex": {
"current_release_date": "2025-12-17T07:04:27+00:00",
"cve": "CVE-2025-13086",
"id": "CVE-2025-13086",
"initial_release_date": "2025-12-03T19:54:10.737000+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "OpenVPN: OpenVPN: Improper validation of source IP addresses leads to denial of service",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-13086.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-07-15T19:07:50Z",
"cve": "CVE-2025-13086",
"id": "CVE-2025-13086",
"initial_release_date": "2025-12-05T00:43:23Z",
"product_status:known_affected": "15",
"product_status:known_not_affected": "83",
"product_status:recommended": "53",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-13086",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-13086.json",
"version": "10"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-13086\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-12-03T21:48:54.419203Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-12-03T21:49:02.639Z\"}}], \"cna\": {\"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 4.6, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U\", \"exploitMaturity\": \"UNREPORTED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"OpenVPN\", \"product\": \"OpenVPN\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2.6.15\"}, {\"status\": \"affected\", \"version\": \"2.7_alpha1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2.7_rc1\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://community.openvpn.net/Security%20Announcements/CVE-2025-13086\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00151.html\", \"tags\": [\"release-notes\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-940\", \"description\": \"CWE-940: Improper Verification of Source of a Communication Channel\"}]}], \"providerMetadata\": {\"orgId\": \"36a55730-e66d-4d39-8ca6-3c3b3017965e\", \"shortName\": \"OpenVPN\", \"dateUpdated\": \"2025-12-12T13:50:46.678Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-13086\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-12T13:50:46.678Z\", \"dateReserved\": \"2025-11-12T19:37:55.606Z\", \"assignerOrgId\": \"36a55730-e66d-4d39-8ca6-3c3b3017965e\", \"datePublished\": \"2025-12-03T19:54:10.737Z\", \"assignerShortName\": \"OpenVPN\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…