CVE-2026-2249 in DFS
Summary
by MITRE • 02/11/2026
METIS DFS devices (versions <= oscore 2.1.234-r18) expose a web-based shell at the /console endpoint that does not require authentication. Accessing this endpoint allows a remote attacker to execute arbitrary operating system commands with 'daemon' privileges. This results in the compromise of the software, granting unauthorized access to modify configuration, read and alter sensitive data, or disrupt services.
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Analysis
by VulDB Data Team • 02/11/2026
The vulnerability identified as CVE-2026-2249 affects METIS DFS devices running software versions up to and including oscore 2.1.234-r18 where a critical security flaw exists in the device's web interface implementation. This vulnerability manifests through an unauthenticated web-based shell exposed at the /console endpoint, representing a fundamental failure in the device's access control mechanisms. The flaw allows remote attackers to bypass authentication entirely and gain direct command execution capabilities, fundamentally undermining the device's security posture and creating a significant attack surface for malicious actors.
The technical nature of this vulnerability stems from improper authentication implementation within the device's web interface, specifically violating the principle of least privilege and authentication requirements that should be enforced for administrative access points. The /console endpoint serves as an administrative interface without any form of access control verification, making it trivial for attackers to gain entry. According to CWE classification, this represents a weakness in authentication mechanisms where insufficient or missing authentication checks allow unauthorized access to privileged functions, specifically CWE-287 for improper authentication and CWE-79 for injection vulnerabilities that may be exploited through command execution.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with daemon-level privileges that enable complete compromise of the affected devices. With daemon privileges, attackers can modify device configurations, access sensitive data, and execute arbitrary operating system commands that could lead to service disruption, data exfiltration, or further network infiltration. This vulnerability creates a persistent backdoor that can be exploited by attackers to maintain long-term access to the compromised devices, potentially enabling lateral movement within networks where these devices reside. The impact extends beyond individual device compromise to potential network-wide consequences, particularly in industrial control systems or critical infrastructure environments where METIS DFS devices are commonly deployed.
Mitigation strategies for CVE-2026-2249 must prioritize immediate remediation through software updates to versions that address the authentication flaw in the /console endpoint. Organizations should implement network segmentation to limit access to these devices, restrict network access to the /console endpoint through firewalls or access control lists, and monitor network traffic for suspicious activity related to the /console endpoint. The implementation of network-based intrusion detection systems can help identify exploitation attempts, while regular security audits should verify that authentication mechanisms are properly enforced. Additionally, organizations should consider disabling the /console endpoint entirely if it is not required for operational purposes, following the principle of least functionality. According to ATT&CK framework, this vulnerability maps to T1059 for command and script execution and T1078 for valid accounts, highlighting the need for comprehensive monitoring and access control measures to prevent unauthorized command execution and maintain operational security.