All vulnerabilities
CVE-2026-39808

Fortinet FortiSandbox OS Command Injection Vulnerability

Fortinet FortiSandboxNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.1Critical
ExploitationExploited in the wildAdded to KEV 16 Jul 2026CISA KEV
Exploit odds (EPSS)47.4%Chance of exploitation activity in the next 30 days, higher than 98% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline19 Jul 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply 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 KEV
Patching is not enoughCISA requires federal agencies to look for signs of compromise on affected systems, not only patch (forensic triage under BOD 26-04). Treat exposed systems as possibly compromised. CISA guidance

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 14 Apr 2026, 15:38 UTCPublishedCVE List
  2. 16 Jul 2026Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Scanner templateFortinet FortiSandbox - Command InjectionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

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.

Text from CVE List

Affected versions 10

  • FortiSandboxaffected: 4.4.0 through 4.4.8CVE List
  • FortiSandbox PaaSaffected: 23.4.4374CVE List
  • FortiSandbox PaaSaffected: 23.4.4350CVE List
  • FortiSandbox PaaSaffected: 23.3.4329CVE List
  • FortiSandbox PaaSaffected: 23.1.4245CVE List
  • FortiSandbox PaaSaffected: 22.2.4151CVE List
  • FortiSandbox PaaSaffected: 22.2.4134CVE List
  • FortiSandbox PaaSaffected: 22.1.4113CVE List
  • FortiSandbox PaaSaffected: 21.4.4072CVE List
  • FortiSandbox PaaSaffected: 21.3.4055CVE List

References 4