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vuln-cve/data/2026/78xxx/CVE-2026-78221.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-78221",
"assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
"state": "PUBLISHED",
"assignerShortName": "OpenVPN",
"dateReserved": "2026-08-26T14:41:20.459Z",
"datePublished": "2026-09-07T07:28:14.135Z",
"dateUpdated": "2026-09-08T14:54:43.480Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
"shortName": "OpenVPN",
"dateUpdated": "2026-09-07T07:28:14.135Z"
},
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-131",
"description": "CWE-131 Incorrect calculation of buffer size",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "OpenVPN",
"product": "OpenVPN",
"platforms": [
"Windows"
],
"versions": [
{
"status": "affected",
"version": "2.7_alpha1",
"lessThanOrEqual": "2.7.6",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs."
}
],
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-78221"
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV4_0": {
"attackVector": "LOCAL",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "PASSIVE",
"vulnConfidentialityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subAvailabilityImpact": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "MEDIUM",
"baseScore": 5.9,
"vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:N/VA:H/SC:H/SI:N/SA:H"
}
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-08T14:54:35.321806Z",
"id": "CVE-2026-78221",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-08T14:54:43.480Z"
}
}
]
}
}