CVE-2026-39808

CRITICALCVSS 9.8Known Exploited

CISA Known Exploited Vulnerability

https://fortiguard.fortinet.com/psirt/FG-IR-26-100 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-39808

Remediation deadline: July 19, 2026

Description

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

Timeline

Published:April 14th, 2026 4:16 PM

Last modified:July 17th, 2026 5:16 AM

Added to KEV:July 16th, 2026

CVSS Scoring

CVSS v3: 9.8 (CRITICAL)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Software

From NVD CPE configuration data

Vendors

fortinet

Products

fortisandbox

Weaknesses (CWE)

CWE-78

References & Reports

Advisories, patches, and third-party reports

Source: NIST NVD · Data may lag official sources by up to one minute