CVE-2026-21643 Scanner

Fortinet FortiClientEMS is widely utilized by various organizations to manage endpoint security across corporate networks. It provides centralized management for Fortinet endpoint devices, enabling administrators to enforce security policies and monitor device status remotely. Designed for enterprise use, FortiClientEMS supports large-scale deployments and integrates with other Fortinet solutions for enhanced security efficacy. The platform is crucial in maintaining network resilience by managing endpoint configurations, patches, and security alerts. Organizations of all sizes rely on FortiClientEMS for its robust management capabilities and ease of use, significantly contributing to the security posture of an organization's endpoints.

SQL Injection vulnerabilities occur when input data is not properly sanitized, allowing attackers to inject malicious SQL statements. In the context of Fortinet FortiClientEMS, this type of vulnerability can compromise databases, leading to unauthorized access to sensitive information. The vulnerability specifically affects the /api/v1/init_consts endpoint, where unsanitized input can be exploited to manipulate SQL queries executed by the database. As SQL Injection vulnerabilities can lead to unauthorized data manipulation, they pose a severe risk to data confidentiality, integrity, and availability. Addressing SQL Injection vulnerabilities is critical to protecting database-driven applications from malicious exploits.

The vulnerability in Fortinet FortiClientEMS is triggered via the 'Site' HTTP header, which is improperly sanitized before being utilized in database operations. An attacker can inject arbitrary SQL commands, compromising the security of the database backend. By manipulating the PostgreSQL search_path through the unsanitized input, attackers can execute SQL queries to disclose information, manipulate data, or even achieve remote code execution with certain PostgreSQL functions. The issue is heightened by the endpoint's lack of authentication, allowing unauthenticated attackers to exploit the vulnerability effectively.

When exploited, this SQL Injection vulnerability can have severe implications. Attackers may gain unauthorized access to the database, leading to sensitive data being exposed, altered, or erased. In more severe cases, attackers could use PostgreSQL features to execute commands at the operating system level, potentially gaining control of affected systems. This could disrupt business operations and diminish trust in the affected organization due to data breaches and service downtime.

REFERENCES

• https://www.fortiguard.com/psirt/FG-IR-2026-21643
• https://nvd.nist.gov/vuln/detail/CVE-2026-21643