CRITICAL CISA KEV

CVE-2026-39808

CVSS v3

9.8

CRITICAL

EPSS Score

0.3%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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>

CISA Known Exploited Vulnerability

Date Added
7/16/2026
Patch Due Date
7/19/2026
Ransomware Use
Unknown

Technical details

Published
4/14/2026

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>

Is CVE-2026-39808 actively exploited?

Yes. CVE-2026-39808 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 7/19/2026.

What is the CVSS score for CVE-2026-39808?

CVE-2026-39808 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-39808 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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