CVE-2026-106172 in FortiSandbox
Summary
by MITRE • 10/13/2026
A use of hard-coded cryptographic key vulnerability in Fortinet FortiSandbox 5.2.0 through 5.2.1, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4 all versions, FortiSandbox Cloud 5.2.0 through 5.2.1, FortiSandbox Cloud 5.0.0 through 5.0.6, FortiSandbox Cloud 4.4 all versions may allow attacker to escalation of privilege via specially crafted HTTP requests
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Analysis
by VulDB Data Team • 10/13/2026
The vulnerability identified in Fortinet FortiSandbox and its cloud counterpart represents a critical failure in cryptographic key management practices within the application's authentication or session handling mechanisms. This flaw, cataloged under CWE-798 as the use of hard-coded credentials, affects multiple versions including FortiSandbox 5.2.0 through 5.2.1, 5.0.0 through 5.0.6, and all versions of 4.4, along with their corresponding cloud deployments. The core technical issue lies in the implementation where cryptographic keys used for securing communications or validating user sessions are embedded directly into the source code rather than being dynamically generated or securely stored in a protected key vault. This static nature means that once an attacker discovers these hard-coded keys through reverse engineering of the binary files or by analyzing network traffic from compromised instances, they gain access to secrets that should be unique and secret per deployment instance.
From an operational perspective, this vulnerability facilitates privilege escalation attacks where an unauthorized actor can manipulate HTTP requests to impersonate legitimate users or administrative accounts. By utilizing specially crafted HTTP requests signed with the discovered hard-coded keys, attackers can bypass authentication controls entirely. This allows them to execute commands, modify configurations, exfiltrate sensitive data contained within sandboxed environments, and potentially pivot to other systems on the network. The impact is severe because FortiSandbox typically processes malware samples and contains high-value threat intelligence; compromising it not only exposes internal security operations but also undermines the integrity of the entire incident response workflow dependent on accurate analysis results.
The attack vector aligns with MITRE ATT&CK techniques related to credential dumping or abuse, specifically leveraging valid credentials obtained through unauthorized means to maintain persistence and escalate privileges within the target environment. Since the keys are static across all installations running affected versions, a single discovery of the key compromises every instance globally until patched. This widespread exposure significantly increases the risk surface for organizations relying on these specific legacy or older current versions of FortiSandbox solutions.
Mitigation strategies must prioritize immediate patching to the latest stable version provided by Fortinet, which replaces hard-coded keys with dynamic generation mechanisms or integrates with secure hardware security modules. In environments where updating is not immediately feasible, network segmentation should be enforced to restrict access to the management interfaces and API endpoints of FortiSandbox systems. Additionally, implementing strict input validation on all HTTP requests can help detect anomalies associated with crafted payloads attempting to exploit this flaw. Security teams should also audit logs for unusual authentication patterns or unauthorized administrative actions that may indicate exploitation attempts using stolen keys. Regular rotation of any remaining secrets and adherence to OWASP guidelines for cryptographic storage are essential long-term remediation steps to prevent recurrence of such credential management failures.