CVE-2026-25039

{
  "id": "CVE-2026-25039",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-20T16:16:56.913",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Parsec is a cloud-based application for simple and cryptographically secure file sharing. The application does not sanitize the workspace name, creating a vulnerability if that workspace name is a UNC path. When creating mountpoint in the windows filesystem to mount the workspace of an organization, the application does not sanitize the workspace name. The cause issue if the workspace name evaluate to a UNC path since it's allowed for the name to containt `\\` char. If the UNC path is invalid (or the targeted resource is not available) the application become unresponsive otherwise the system will interact with the mounted UNC path allowing the attacker to retrieve to [`NTLM`] hash."
    },
    {
      "lang": "es",
      "value": "Parsec es una aplicación basada en la nube para compartir archivos de forma sencilla y criptográficamente segura. La aplicación no sanea el nombre del espacio de trabajo, creando una vulnerabilidad si ese nombre de espacio de trabajo es una ruta UNC. Al crear un punto de montaje en el sistema de archivos de Windows para montar el espacio de trabajo de una organización, la aplicación no sanea el nombre del espacio de trabajo. Esto causa un problema si el nombre del espacio de trabajo se evalúa como una ruta UNC, ya que se permite que el nombre contenga el carácter ’\\’. Si la ruta UNC no es válida (o el recurso objetivo no está disponible), la aplicación deja de responder; de lo contrario, el sistema interactuará con la ruta UNC montada, permitiendo al atacante recuperar el hash [NTLM]."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Scille",
          "product": "parsec-cloud",
          "versions": [
            {
              "version": "< 3.3.3-rc.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-20T16:28:59.196493Z",
          "id": "CVE-2026-25039",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-40"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Scille/parsec-cloud/security/advisories/GHSA-qx56-wxpm-j4m6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Scille/parsec-cloud/security/advisories/GHSA-qx56-wxpm-j4m6",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}