Fortinet FortiSandbox OS Command Injection Vulnerability
Fortinet — FortiSandbox
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>
9.8
84.2%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Apr 14, 2026
- Modified
- Jul 17, 2026
- Added to KEV
- Jul 16, 2026
- Federal patch due
- Jul 19, 2026
CISA 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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
6 foundWeaponization
Public repositories whose name or description references CVE-2026-39808, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- ynsmroztas/FortiSandbox-RCE-Exploit-CVE-2026-39808★ 26
FortiSandbox RCE Scanner — CVE-2026-39808
updated Jul 13, 2026
- samu-delucas/CVE-2026-39808★ 8
PoC for Unauthenticated RCE in FortiSandbox via CVE-2026-39808
updated Jul 17, 2026
- 0xBlackash/CVE-2026-39808★ 1
CVE-2026-39808
updated Jun 12, 2026
- error-inside/CVE-2026-39808★ 0
Fortinet FortiSandbox 4.4.0-4.4.8 - OS Command Injection via tracer-behavior Endpoint
updated Jun 18, 2026
- Lechansky/CVE-2026-39808★ 0
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (CWE-78)
updated Apr 15, 2026
- HORKimhab/CVE-2026-39808★ 0
CVE-2026-39808 - Fortinet Sandbox - Draft
updated Jun 17, 2026
References
Frequently asked questions
What is 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>
How severe is CVE-2026-39808?
CVE-2026-39808 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2026-39808 actively exploited in the wild?
Yes. CVE-2026-39808 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 16, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-39808?
84.2% - meaning FIRST.org's EPSS model estimates a 84.2% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2026-39808?
Yes - a public Nuclei template referencing CVE-2026-39808 exist in public repositories we checked. We also found 6 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2026-39808?
CVE-2026-39808 is classified under CWE-78 (Execute unauthorized code or commands).
Cross-checked against
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