CVE-2026-39808
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
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 47%
- Percentil entre todas las CVEs puntuadas: 99
- Fecha de la puntuación: 3/10/2026
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
- Añadida al catálogo: 16/7/2026
- Plazo de remediación: 19/7/2026
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access92 % - Impacto principal
T1059Command and Scripting Interpreterexecution95 % - Impacto secundario
T1565.001Stored Data Manipulationimpact75 %
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
- CWE-78
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-39808",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-39808",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "active"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-04-14T00:00:00+00:00"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "psirt@fortinet.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"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,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "psirt@fortinet.com",
"affectedData": [
{
"cpes": [
"cpe:2.3:a:fortinet:fortisandbox:4.4.8:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandbox:4.4.7:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandbox:4.4.6:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandbox:4.4.5:*:*:*:*:*:*:*",
"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:*:*:*:*:*:*:*"
],
"vendor": "Fortinet",
"product": "FortiSandbox",
"versions": [
{
"status": "affected",
"version": "4.4.0",
"versionType": "semver",
"lessThanOrEqual": "4.4.8"
}
],
"defaultStatus": "unaffected"
},
{
"cpes": [
"cpe:2.3:a:fortinet:fortisandboxpaas:23.4.4374:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:23.4.4350:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:23.3.4329:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:23.1.4245:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:22.2.4151:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:22.2.4134:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:22.1.4113:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:21.4.4072:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortisandboxpaas:21.3.4055:*:*:*:*:*:*:*"
],
"vendor": "Fortinet",
"product": "FortiSandbox PaaS",
"versions": [
{
"status": "affected",
"version": "23.4.4374"
},
{
"status": "affected",
"version": "23.4.4350"
},
{
"status": "affected",
"version": "23.3.4329"
},
{
"status": "affected",
"version": "23.1.4245"
},
{
"status": "affected",
"version": "22.2.4151"
},
{
"status": "affected",
"version": "22.2.4134"
},
{
"status": "affected",
"version": "22.1.4113"
},
{
"status": "affected",
"version": "21.4.4072"
},
{
"status": "affected",
"version": "21.3.4055"
}
],
"defaultStatus": "unaffected"
}
]
}
],
"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": [
{
"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": [
{
"criteria": "cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "94FFE14D-51FF-4D31-A0FD-5B0877081A04",
"versionEndIncluding": "4.4.9",
"versionStartIncluding": "4.4.0"
}
],
"operator": "OR"
}
]
}
],
"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"
}