CVE-2025-6892 in EDR-G9010
Summary
by MITRE • 10/17/2025
An Incorrect Authorization vulnerability has been identified in Moxa’s network security appliances and routers. A flaw in the API authentication mechanism allows unauthorized access to protected API endpoints, including those intended for administrative functions. This vulnerability can be exploited after a legitimate user has logged in, as the system fails to properly validate session context or privilege boundaries. An attacker may leverage this flaw to perform unauthorized privileged operations. While successful exploitation can severely impact the confidentiality, integrity, and availability of the affected device itself, there is no loss of confidentiality or integrity within any subsequent systems.
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Analysis
by VulDB Data Team • 10/17/2025
The vulnerability identified as CVE-2025-6892 represents a critical authorization flaw within Moxa's network security appliances and routers that undermines the fundamental security controls designed to protect administrative functions. This issue manifests as an incorrect authorization condition that allows attackers to escalate privileges and access protected API endpoints without proper authentication. The vulnerability specifically targets the API authentication mechanism, which serves as a primary interface for administrative operations and system configuration management. Security researchers have determined that this flaw exists in the session validation process, where the system fails to properly verify session context and privilege boundaries after initial user authentication. This oversight creates a persistent security gap that can be exploited by threat actors who have already gained access to a legitimate user account, making the vulnerability particularly dangerous as it operates within the trusted session boundary.
The technical implementation of this vulnerability stems from inadequate session management and privilege validation mechanisms within the affected network appliances. When a legitimate user authenticates to the system, the application should maintain strict validation of session context and enforce proper privilege boundaries to prevent unauthorized access to administrative functions. However, the flaw allows attackers to bypass these controls by leveraging the existing authenticated session to access protected endpoints that should only be available to users with elevated privileges. This issue falls under the CWE-285 category of Improper Authorization, which specifically addresses scenarios where applications fail to properly enforce access controls and authorization checks. The vulnerability's exploitation path typically involves an attacker who has already established a valid session and then attempts to access administrative API endpoints through direct API calls or by manipulating the session context to escalate privileges.
The operational impact of CVE-2025-6892 extends beyond the immediate compromise of the affected device itself, potentially enabling attackers to gain full administrative control over the network security appliance. This level of access allows unauthorized individuals to modify network configurations, implement malicious firewall rules, disable security features, and potentially establish persistent backdoors within the network infrastructure. The compromise of these devices can severely impact the confidentiality, integrity, and availability of network communications, as the appliances serve as critical gateways for traffic filtering and security enforcement. According to ATT&CK framework, this vulnerability maps to T1078 (Valid Accounts) and T1566 (Phishing) as attackers may leverage existing user sessions to gain elevated privileges, while T1059 (Command and Scripting Interpreter) could be employed for executing malicious commands through the compromised administrative interfaces. The potential for lateral movement within the network increases significantly when attackers can manipulate these security appliances, as they often serve as central points for network traffic control and monitoring.
Organizations utilizing Moxa network security appliances and routers must implement immediate mitigations to address this vulnerability, including applying vendor-provided security patches and firmware updates as soon as they become available. Network segmentation and monitoring should be enhanced to detect unauthorized access attempts to administrative APIs, with particular attention to unusual API access patterns and privilege escalation activities. The implementation of multi-factor authentication for administrative access should be considered as an additional security layer, while regular security audits should verify that proper access controls are maintained across all administrative interfaces. Security teams should also review and validate session management configurations to ensure that privilege boundaries are properly enforced and that session tokens are adequately protected against session hijacking attempts. The vulnerability's classification as a high-severity issue according to CVSS scoring standards indicates that immediate remediation is required to prevent potential compromise of critical network infrastructure and to maintain the overall security posture of the organization's network environment.