Historical catalog analysis: CISA added this entry on July 16, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2026-25089 is an OS command injection vulnerability (CWE-78) identified in Fortinet FortiSandbox. The flaw allows an unauthenticated attacker to execute unauthorized commands on the underlying system by sending specifically crafted HTTP requests.
Exposure and applicability
This vulnerability affects multiple deployment models of the product, including:
* FortiSandbox (on-premises)
* FortiSandbox Cloud
* FortiSandbox PaaS
Exposure is highest for assets that are directly accessible via the internet. Organizations utilizing the Cloud or PaaS versions should evaluate their specific service configurations to determine if the HTTP interface is exposed to untrusted networks.
Remediation priorities
Our analysis suggests prioritizing remediation based on network placement and accessibility. Because this vulnerability requires no authentication, any internet-facing instance represents a critical exposure path.
- Immediate Mitigation: Apply the mitigations detailed in vendor advisory FG-IR-26-141. This is the primary corrective action supported by the source to address the command injection vector.
- Exposure Reduction: For on-premises deployments, restrict HTTP access to known, trusted management IPs to reduce the attack surface while patching is underway.
- Cloud/PaaS Review: Coordinate with service providers or review cloud console configurations to ensure that only necessary interfaces are exposed to the public internet.
How to validate remediation
Verification must go beyond a simple version check. To assure that exposure has been reduced, defenders should:
* Confirm Mitigation Application: Verify through system logs or vendor-provided tools that the specific mitigations from FG-IR-26-141 have been successfully applied.
* Network Validation: Use authorized network scanning to confirm that HTTP interfaces are no longer reachable from unauthorized external IP addresses.
* Configuration Audit: Review the current configuration against the vendor’s hardened baseline to ensure no secondary paths for unauthenticated HTTP requests remain open.
Limits and open questions
While the vulnerability is documented, the source lists known ransomware campaign use as “Unknown.” It remains unclear if this flaw has been exploited in the wild prior to its inclusion in the CISA Known Exploited Vulnerabilities catalog.
Residual risk persists if mitigations are applied but network-level access controls remain permissive; an attacker who gains internal network access could still potentially target unpatched or improperly configured instances. Furthermore, the effectiveness of these mitigations depends on strict adherence to the vendor’s specific implementation instructions.
Source and editorial note
CVE-2026-25089: Fortinet FortiSandbox OS Command Injection Vulnerability · Source date: July 16, 2026 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: July 19, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 02, 2026 at 03:46 UTC.
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