Actively exploited in the wild
Fortinet FortiSandbox OS Command Injection Vulnerability
Fortinet - FortiSandbox · Listed in the CISA KEV since 2026-07-16. This indicates confirmed attacks in production environments.
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.
CVE-2026-25089
CriticalCVSS 9.8KEVExploitation Probability (EPSS)
Very high risk98th percentile - higher than 98% of all known CVEs
Summary
An OS command injection vulnerability in Fortinet FortiSandbox (versions 5.0.0-5.0.5, 4.4.0-4.4.8, 4.2 all, FortiSandbox Cloud 5.0.4-5.0.5, FortiSandbox PaaS 5.0.4-5.0.5). An unauthenticated attacker can execute unauthorized commands via crafted HTTP requests.
Risk Assessment
An attacker can remotely execute commands on the FortiSandbox device, leading to full system compromise.
Recommendation
Upgrade FortiSandbox to a patched version (e.g., 5.0.6 or later).
Other vulnerabilities in FortiSandbox
See all- CVE-2026-26083Critical
A missing authorization vulnerability in Fortinet FortiSandbox allows an unauthenticated attacker to execute unauthorized code or commands via HTTP requests. The issue affects multiple versions of FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS.
- CVE-2026-39808CriticalActively exploited
An OS command injection vulnerability has been discovered in Fortinet FortiSandbox versions 4.4.0 through 4.4.8. This flaw is due to improper neutralization of special elements used in OS commands.
- CVE-2026-84387High
A improper neutralization of special elements used in a command ('command injection') vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
- CVE-2026-59835High
A vulnerability in Fortinet FortiSandbox versions 5.0.0-5.0.2 and 4.4.3-4.4.8 allows an unauthenticated attacker to access the VNC server of scanning VMs. The issue is due to improper resource access restrictions.
Original NVD description (English source)
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox 4.2 all versions, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests
Vulnerability data from NVD (NIST) · CISA KEV · EPSS