---
id: CVE-2026-39808
title: >-
  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…
summary: >-
  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…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: fortinet
product: fortisandbox
affected:
  - 'fortisandbox >= 4.4.0, <= 4.4.9'
published: '2026-04-14'
updated: '2026-07-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-39808'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-26-100'
    label: psirt@fortinet.com
  - url: 'https://github.com/samu-delucas/CVE-2026-39808'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39808
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.47362
epssPercentile: 0.98798
kev: true
kevDateAdded: '2026-07-16'
kevDueDate: '2026-07-19'
kevRansomware: false
exploited: true
ingestedAt: '2026-07-16T18:56:41.173Z'
exploits:
  github: 5
  githubRepos:
    - 'https://github.com/samu-delucas/CVE-2026-39808'
    - 'https://github.com/0xBlackash/CVE-2026-39808'
    - 'https://github.com/ynsmroztas/FortiSandbox-RCE-Exploit-CVE-2026-39808'
  nuclei:
    - CVE-2026-39808
  checkedAt: '2026-09-25T08:20:56.311Z'
exploitAvailable: true
---

## Overview

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>

## Affected

- `fortisandbox >= 4.4.0, <= 4.4.9`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.