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CVE-2026-39808

Estado: AnalizadaCrítica (9.8)⚠ Explotación activa

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 may allow attacker to execute unauthorized code or commands via <insert attack vector here>

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

CISA KEV — explotada activamente

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de inyección de comandos OS (CWE-78) en aplicación expuesta (AV:N, PR:N, UI:N). Vector crítico permite ejecución remota de código y manipulación de datos en FortiSandbox.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Tecnologías afectadas (1)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-39808",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-39808",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "active"
            },
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              "automatable": "yes"
            },
            {
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          ],
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          "timestamp": "2026-04-14T00:00:00+00:00"
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          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
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      "affectedData": [
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            "cpe:2.3:a:fortinet:fortisandbox:4.4.4:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortisandbox:4.4.3:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortisandbox:4.4.2:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortisandbox:4.4.1:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortisandbox:4.4.0:*:*:*:*:*:*:*"
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          "vendor": "Fortinet",
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          "versions": [
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              "status": "affected",
              "version": "22.2.4151"
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            {
              "status": "affected",
              "version": "22.1.4113"
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            {
              "status": "affected",
              "version": "21.4.4072"
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            {
              "status": "affected",
              "version": "21.3.4055"
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          ],
          "defaultStatus": "unaffected"
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  ],
  "published": "2026-04-14T16:16:44.860",
  "references": [
    {
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-100",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@fortinet.com"
    },
    {
      "url": "https://github.com/samu-delucas/CVE-2026-39808",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39808",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "psirt@fortinet.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 may allow attacker to execute unauthorized code or commands via <insert attack vector here>"
    }
  ],
  "lastModified": "2026-07-17T05:16:38.870",
  "cisaActionDue": "2026-07-19",
  "cisaExploitAdd": "2026-07-16",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*",
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              "versionEndIncluding": "4.4.9",
              "versionStartIncluding": "4.4.0"
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          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "psirt@fortinet.com",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "Fortinet FortiSandbox OS Command Injection Vulnerability"
}