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CVE-2026-39808

FortiSandbox - OS Command Handler

Fortinet CVSS 9.8 Updated April 16, 2026

Executive Risk Summary

"A vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 allows an attacker to execute unauthorized code or commands via os command injection. This vulnerability may lead to unauthorized access and control of the system."

Anticipated Attack Path

  1. 1. Initial exploitation of the os command injection vulnerability
  2. 2. Escalation of privileges to gain control of the system
  3. 3. Lateral movement and potential exploitation of connected systems

Am I Vulnerable?

  • Verify FortiSandbox version and apply the latest patch
  • Monitor system logs for suspicious activity
  • Limit access to the FortiSandbox appliance to authorized personnel

Operational Audit Arsenal

Target Type Process
Target Asset fsa_service
Standard Path /opt/fortisandbox/bin/

Manual Verification Required

This is a non-Windows asset (Fortinet). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

Potential disruption to sandbox analysis and reporting

Internal Work Notes

CVE-2026-39808: FortiSandbox os command injection vulnerability - apply patch and verify system integrity

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Related Fortinet Threats

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.