CVE-2026-63649 (GCVE-0-2026-63649)
Vulnerability from cvelistv5
Published
2026-08-14 22:13
Modified
2026-08-17 15:38
CWE
  • CWE-183 - Permissive list of allowed inputs
Summary
The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks
Impacted products
Vendor Product Version
OpenVPN OpenVPN Version: 2.4.0   
Version: 2.7_alpha1   
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-63649",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-17T15:22:21.395155Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-17T15:38:37.331Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "OpenVPN",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThan": "2.6.22",
              "status": "affected",
              "version": "2.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.7.6",
              "status": "affected",
              "version": "2.7_alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-07-29T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks"
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 4.1,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-183",
              "description": "CWE-183 Permissive list of allowed inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-14T22:13:21.590Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-63649"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://community.openvpn.net/ReleaseHistory#openvpn-276-released-5-august-2026"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://community.openvpn.net/ReleaseHistory#openvpn-2622-released-5-august-2026"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2026-63649",
    "datePublished": "2026-08-14T22:13:21.590Z",
    "dateReserved": "2026-07-17T14:38:48.698Z",
    "dateUpdated": "2026-08-17T15:38:37.331Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"36a55730-e66d-4d39-8ca6-3c3b3017965e\", \"shortName\": \"OpenVPN\", \"dateUpdated\": \"2026-08-14T22:13:21.590Z\"}, \"datePublic\": \"2026-07-29T16:00:00.000Z\", \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"cweId\": \"CWE-183\", \"description\": \"CWE-183 Permissive list of allowed inputs\", \"type\": \"CWE\"}]}], \"affected\": [{\"vendor\": \"OpenVPN\", \"product\": \"OpenVPN\", \"platforms\": [\"Windows\"], \"versions\": [{\"status\": \"affected\", \"version\": \"2.4.0\", \"lessThan\": \"2.6.22\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.7_alpha1\", \"lessThan\": \"2.7.6\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks\"}], \"references\": [{\"url\": \"https://community.openvpn.net/Security%20Announcements/CVE-2026-63649\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://community.openvpn.net/ReleaseHistory#openvpn-276-released-5-august-2026\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://community.openvpn.net/ReleaseHistory#openvpn-2622-released-5-august-2026\", \"tags\": [\"release-notes\"]}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}], \"cvssV4_0\": {\"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"ACTIVE\", \"vulnConfidentialityImpact\": \"LOW\", \"subConfidentialityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"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\": 4.1, \"vectorString\": \"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N\"}}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-63649\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-17T15:22:21.395155Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-17T15:38:32.672Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-63649\", \"assignerOrgId\": \"36a55730-e66d-4d39-8ca6-3c3b3017965e\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"OpenVPN\", \"dateReserved\": \"2026-07-17T14:38:48.698Z\", \"datePublished\": \"2026-08-14T22:13:21.590Z\", \"dateUpdated\": \"2026-08-17T15:38:37.331Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…