GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-2638 (GCVE-0-2026-2638)

Vulnerability from cvelistv5 – Published: 2026-06-09 11:21 – Updated: 2026-06-09 13:50
VLAI
Title
X-VPN macOS website versions - Local Privilege Escalation
Summary
A vulnerability in the quarantine and restore workflow of the X-VPN macOS website versions 77.0 through 77.5 allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 12:59 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version CPE status
X-VPN X-VPN macOS website Affected: 77.0 , ≤ 77.5 (custom)
    cpe:2.3:a:x-vpn:x-vpn_macos_website:*:*:macos:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-2638",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T12:59:54.492284Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T13:50:29.937Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://fluidattacks.com/es/advisories/soad"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "MacOS"
          ],
          "product": "X-VPN macOS website",
          "vendor": "X-VPN",
          "versions": [
            {
              "lessThanOrEqual": "77.5",
              "status": "affected",
              "version": "77.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:x-vpn:x-vpn_macos_website:*:*:macos:*:*:*:*:*",
                  "versionEndIncluding": "77.5",
                  "versionStartIncluding": "77.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Oscar Uribe"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA vulnerability in the quarantine and restore workflow of the \u003cstrong\u003eX-VPN macOS website versions 77.0 through 77.5\u003c/strong\u003e allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.\u003c/p\u003e\u003cp\u003e\u003c/p\u003e"
            }
          ],
          "value": "A vulnerability in the quarantine and restore workflow of the X-VPN macOS website versions 77.0 through 77.5 allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-233",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-233 Privilege Escalation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-09T11:21:30.879Z",
        "orgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869",
        "shortName": "Fluid Attacks"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://fluidattacks.com/es/advisories/soad"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://xvpn.io/resources/statement-local-privilege-escalation-vulnerability"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://xvpn.io/download/vpn-mac"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://xvpn.io/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "X-VPN macOS website versions - Local Privilege Escalation",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869",
    "assignerShortName": "Fluid Attacks",
    "cveId": "CVE-2026-2638",
    "datePublished": "2026-06-09T11:21:30.879Z",
    "dateReserved": "2026-02-17T19:47:28.172Z",
    "dateUpdated": "2026-06-09T13:50:29.937Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-2638",
      "date": "2026-09-15",
      "epss": "0.00085",
      "percentile": "0.00353"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-2638\",\"sourceIdentifier\":\"help@fluidattacks.com\",\"published\":\"2026-06-09T13:16:35.680\",\"lastModified\":\"2026-07-23T08:10:00.137\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the quarantine and restore workflow of the X-VPN macOS website versions 77.0 through 77.5 allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en el flujo de trabajo de cuarentena y restauraci\u00f3n de las versiones 77.0 a 77.5 del sitio web de X-VPN para macOS permite a un atacante local aprovechar una condici\u00f3n de carrera y la manipulaci\u00f3n de enlaces simb\u00f3licos para lograr la corrupci\u00f3n de archivos privilegiados.\"}],\"affected\":[{\"source\":\"help@fluidattacks.com\",\"affectedData\":[{\"vendor\":\"X-VPN\",\"product\":\"X-VPN macOS website\",\"defaultStatus\":\"unaffected\",\"platforms\":[\"MacOS\"],\"versions\":[{\"version\":\"77.0\",\"lessThanOrEqual\":\"77.5\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"help@fluidattacks.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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\":7.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"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\"}}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-09T12:59:54.492284Z\",\"id\":\"CVE-2026-2638\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"help@fluidattacks.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-367\"}]}],\"references\":[{\"url\":\"https://fluidattacks.com/es/advisories/soad\",\"source\":\"help@fluidattacks.com\"},{\"url\":\"https://xvpn.io/\",\"source\":\"help@fluidattacks.com\"},{\"url\":\"https://xvpn.io/download/vpn-mac\",\"source\":\"help@fluidattacks.com\"},{\"url\":\"https://xvpn.io/resources/statement-local-privilege-escalation-vulnerability\",\"source\":\"help@fluidattacks.com\"},{\"url\":\"https://fluidattacks.com/es/advisories/soad\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\"}]}}",
    "redhat_vex": {
      "current_release_date": "2026-06-10T14:59:46+00:00",
      "cve": "CVE-2026-2638",
      "id": "CVE-2026-2638",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "X-VPN macOS website versions - Local Privilege Escalation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2638.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-2638\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-09T12:59:54.492284Z\"}}}], \"references\": [{\"url\": \"https://fluidattacks.com/es/advisories/soad\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-09T13:50:26.560Z\"}}], \"cna\": {\"title\": \"X-VPN macOS website versions - Local Privilege Escalation\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Oscar Uribe\"}], \"impacts\": [{\"capecId\": \"CAPEC-233\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-233 Privilege Escalation\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 7.3, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"X-VPN\", \"product\": \"X-VPN macOS website\", \"versions\": [{\"status\": \"affected\", \"version\": \"77.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"77.5\"}], \"platforms\": [\"MacOS\"], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://fluidattacks.com/es/advisories/soad\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://xvpn.io/resources/statement-local-privilege-escalation-vulnerability\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://xvpn.io/download/vpn-mac\", \"tags\": [\"patch\"]}, {\"url\": \"https://xvpn.io/\", \"tags\": [\"product\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the quarantine and restore workflow of the X-VPN macOS website versions 77.0 through 77.5 allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eA vulnerability in the quarantine and restore workflow of the \u003cstrong\u003eX-VPN macOS website versions 77.0 through 77.5\u003c/strong\u003e allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-367\", \"description\": \"CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:x-vpn:x-vpn_macos_website:*:*:macos:*:*:*:*:*\", \"vulnerable\": true, \"versionEndIncluding\": \"77.5\", \"versionStartIncluding\": \"77.0\"}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"84fe0718-d6bb-4716-a7e8-81a6d1daa869\", \"shortName\": \"Fluid Attacks\", \"dateUpdated\": \"2026-06-09T11:21:30.879Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-2638\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-09T13:50:29.937Z\", \"dateReserved\": \"2026-02-17T19:47:28.172Z\", \"assignerOrgId\": \"84fe0718-d6bb-4716-a7e8-81a6d1daa869\", \"datePublished\": \"2026-06-09T11:21:30.879Z\", \"assignerShortName\": \"Fluid Attacks\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


Loading…