Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since July 16, 2026.
CVE-2026-39808
Fortinet FortiSandbox OS Command Injection Vulnerability
Added to KEV July 16, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-39808
- CWE
- CWE-78
- Affected products
- FortiSandbox · Fortinet FortiSandbox · Fortinet
What happened
Fortinet FortiSandbox contains an OS command injection vulnerability that could allow an unauthenticated attacker to execute unauthorized code or commands via crafted HTTP requests.
What it means for your business
Fortinet FortiSandbox is listed in CISA's Known Exploited Vulnerabilities catalog (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. CISA remediation due date: 2026-07-19. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: July 19, 2026
Sources
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