CVE-2026-5703 in SenNet Datalogger
Summary
by MITRE • 10/07/2026
Path traversal vulnerability in the Satel Iberia SenNet Datalogger Serie 200, specifically in the web portal provided by the device, which allows an authenticated user to read any file or list any directory accessible to the system user running the web server. This is possible by modifying the URL to include a path traversal payload. Successful exploitation of this vulnerability could allow an attacker to access critical system files containing confidential information.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 10/07/2026
The Satel Iberia SenNet Datalogger Serie 200 represents a class of industrial Internet of Things devices designed for environmental monitoring and data logging, often deployed in sensitive operational environments where the integrity and confidentiality of collected data are paramount. The device incorporates an embedded web portal to facilitate configuration, status monitoring, and historical data retrieval by authorized personnel. However, security assessments have identified a critical path traversal vulnerability within this web interface that undermines the fundamental principle of least privilege expected in secure system design. This flaw is not merely a cosmetic issue but represents a significant breach of access control mechanisms, allowing an authenticated user to bypass intended file system restrictions and interact with arbitrary locations on the underlying operating system.
The technical root cause of this vulnerability lies in improper validation or sanitization of input parameters passed via URL queries within the web application logic. When a user requests specific files or directory listings through the portal, the backend script constructs a file path based on these inputs without adequately checking for sequence characters that indicate parent directory navigation, such as dot-dot-slash sequences. By manipulating the request to include these traversal payloads, an attacker can shift the target context from the intended web root directory to arbitrary locations in the system hierarchy. This mechanism effectively neutralizes the isolation boundaries established by the web server configuration, granting the process running under limited privileges elevated access rights equivalent to those of the user account executing the web service daemon.
From a classification perspective, this vulnerability aligns directly with CWE-22: Improper Limitation of a Pathname to a Restricted Directory, which describes flaws where software does not properly neutralize special elements within file names that can cause files or directories to be located outside of the intended restricted directory. Furthermore, in terms of tactical behavior, this exploitation technique corresponds to ATT&CK tactic T1083: File and Directory Discovery, specifically leveraging techniques such as path traversal to enumerate system contents. The ability to list any accessible directory provides an attacker with critical reconnaissance capabilities, enabling them to map out the file structure, identify configuration files, locate database storage locations, or discover other sensitive artifacts that may contain credentials or proprietary data.
The operational impact of this vulnerability is severe due to the potential for unauthorized disclosure of confidential information and system intelligence. An authenticated adversary can exploit this flaw to read critical system files such as password hashes, SSH keys, application configuration files containing API tokens or database connection strings, and logs that might reveal network topology or internal IP addresses. In industrial control systems and IoT deployments, such exposure often serves as a stepping stone for more advanced attacks, including privilege escalation, lateral movement across the local network, or sabotage of monitoring capabilities by altering log integrity. The fact that authentication is required does not mitigate the risk significantly if credentials are obtained through phishing, brute force, or credential stuffing, which remain prevalent threats in operational technology environments.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. Vendors should immediately release a patch that enforces strict input validation on all file path parameters, ensuring that any user-supplied paths are canonicalized and verified to reside within the designated web root directory before being processed by the operating system. Implementing allow-lists for permitted characters in filenames can further reduce the attack surface. For organizations currently utilizing vulnerable versions of the SenNet Datalogger Serie 200, it is advisable to restrict access to the web portal through network segmentation, placing the device behind a firewall that limits inbound connections to only trusted management stations. Additionally, enforcing strong password policies and multi-factor authentication where supported can reduce the likelihood of an attacker obtaining valid credentials necessary to trigger this vulnerability. Regular security audits and penetration testing should be integrated into the lifecycle management of these devices to ensure ongoing resilience against evolving threat vectors.