Medium
Security advisory
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
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-13086
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 04:02 UTC · Revision 1
Source evidence
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
osv:CVE-2025-13086
Complete source record
{
"id": "b7e843a3aae36fc50aa59582564384466f7eb7fef2abd1d5c54a15b998fe34c6",
"url": "https://osv.dev/vulnerability/CVE-2025-13086",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2025-13086",
"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",
"evidence": "osv:CVE-2025-13086",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2025-13086",
"aliases": [
"CVE-2025-13086"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/openvpn/openvpn",
"type": "GIT",
"events": [
{
"introduced": "b999466418dddb89721be5455f03bacd9b221b1d"
},
{
"fixed": "647b115111079fcfd4e6dc9a8b3a090cfe7c3d93"
},
{
"introduced": "5d3f3556a1f7cb26a2fb5e1c8299f03d0487cc6f"
},
{
"last_affected": "e37f7692df1f258e2d94ee44ac75c5f24e4d6b2d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*",
"range": [
{
"introduced": "2.6.0"
},
{
"fixed": "2.6.16"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:alpha1:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-alpha1"
},
{
"last_affected": "2.7-alpha1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:alpha2:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-alpha2"
},
{
"last_affected": "2.7-alpha2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:alpha3:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-alpha3"
},
{
"last_affected": "2.7-alpha3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:beta1:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-beta1"
},
{
"last_affected": "2.7-beta1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:beta2:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-beta2"
},
{
"last_affected": "2.7-beta2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:beta3:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-beta3"
},
{
"last_affected": "2.7-beta3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:openvpn:openvpn:2.7:rc1:*:*:community:*:*:*",
"range": [
{
"introduced": "2.7-rc1"
},
{
"last_affected": "2.7-rc1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"2.7-alpha1",
"2.7-alpha2",
"2.7-alpha3",
"2.7-beta1",
"2.7-beta2",
"2.7-beta3",
"2.7-rc1",
"v2.7_rc1",
"v2.6.15",
"v2.7_beta3",
"v2.7_beta2",
"v2.7_beta1",
"v2.7_alpha3",
"v2.7_alpha2",
"v2.7_alpha1",
"v2.6.14",
"v2.6.13",
"v2.6.12",
"v2.6.11",
"v2.6.10",
"v2.6.9",
"v2.6.8",
"v2.6.7",
"v2.6.6",
"v2.6.5",
"v2.6.4",
"v2.6.3",
"v2.6.2",
"v2.6.1",
"v2.6.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-13086.json"
}
}
],
"modified": "2026-10-28T02:30:42.187773372Z",
"provider": "osv",
"references": [
"https://community.openvpn.net/Security%20Announcements/CVE-2025-13086",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13086.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-13086",
"https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00151.html",
"https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html"
],
"provider_metadata": {
"cwe_ids": [
"CWE-940"
],
"cna_assigner": "OpenVPN",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "2.6.0"
},
{
"last_affected": "2.6.15"
},
{
"introduced": "2.7_alpha1"
},
{
"last_affected": "2.7_rc1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13086.json"
}
},
"related_cves": [
{
"value": "CVE-2025-13086",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 510094,
"published_at": "2025-12-03T19:54:10.737+00:00"
}