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Actively exploitedCVSS 9.8 · CRITICAL

CVE-2026-39808

Fortinet FortiSandbox contains an OS command injection vulnerability that could allow an unauthenticated attacker to execute unauthorized code or commands via crafted HTTP requests.

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Analysis

Esta vulnerabilidad de inyección de comandos en Fortinet FortiSandbox permite a atacantes no autenticados ejecutar código arbitrario en el servidor mediante peticiones HTTP manipuladas. El fallo está siendo explotado activamente en el mundo real, lo que representa un riesgo crítico para la infraestructura de red y seguridad. Se recomienda actualizar inmediatamente las instancias afectadas para prevenir el compromiso total del sistema.

Relevant roles

CyberSecurityBackendCloudLinux

Severity

Score: 9.8(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-78

CISA KEV

Added to KEV: 2026-07-16
Federal patch deadline: 2026-07-19
Known ransomware use: Unknown
Required action

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.

EPSS

Probability of exploitation (next 30 days): 0.4867 (48.7%)
Percentile: 98.7%
EPSS: 2026-07-16

Affects

fortinet:fortisandbox

Technical description

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>

Published: 4/14/2026, 4:16:44 PM
Last modified: 7/16/2026, 7:05:41 PM

References

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