CVE-2026-105947 in Logsign SIEM
Summary
by MITRE • 10/26/2026
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Innotim Software, Telecommunications, and Consulting Co. Ltd. Logsign SIEM allows Path Traversal.
This issue affects Logsign SIEM: from 6.4.120 before 6.4.122.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 10/26/2026
The identified security flaw represents a critical path traversal vulnerability within the Logsign Security Information and Event Management (SIEM) platform, specifically affecting versions ranging from 6.4.120 up to but not including version 6.4.122 developed by Innotim Software, Telecommunications, and Consulting Co. Ltd. This type of vulnerability is classified under Common Weakness Enumeration as CWE-22, which denotes Improper Limitation of a Pathname to a Restricted Directory. The core technical issue stems from insufficient validation or sanitization of user-supplied input that dictates file system paths. When the application processes these inputs without adequately restricting them to their intended directory scope, an attacker can manipulate relative path sequences such as dot-dot-slash characters to escape the designated restricted area and access files located elsewhere on the underlying operating system.
In the context of a SIEM solution, which serves as the central nervous system for organizational security monitoring by aggregating logs from diverse sources including network devices, servers, and applications, this vulnerability poses an exceptionally high risk. The Logsign SIEM typically stores sensitive data such as authentication credentials, internal network topology details, user activity logs, and potentially encrypted keys or configuration files that govern the platform's behavior. By exploiting the path traversal flaw, a malicious actor with access to the vulnerable interface can read arbitrary files from the server hosting the application. This capability effectively bypasses standard file system permissions because the vulnerability is exploited within the context of the running service account, which often possesses elevated privileges necessary for log ingestion and processing tasks.
The operational impact of this exploitation is severe and multifaceted. Initially, it leads to a complete compromise of confidentiality as attackers can exfiltrate sensitive internal data that was not intended for public or unauthorized access. Beyond mere information disclosure, the ability to read specific configuration files may allow an attacker to understand the system's architecture better, facilitating further attacks such as privilege escalation or lateral movement within the network. If the application logic allows for write operations in conjunction with path traversal, the risk escalates to remote code execution, although even without that capability, the exposure of cryptographic keys or session tokens can lead to full account takeover and impersonation of legitimate users. This undermines the integrity and availability aspects of the security triad by potentially allowing attackers to tamper with logs to cover their tracks or disrupt monitoring capabilities.
From a threat intelligence perspective, this vulnerability aligns with ATT&CK technique T1083, which covers File and Directory Discovery, as well as T1552.004 for Unsecured Credentials if sensitive files containing passwords are accessed. The exploitation vector is typically classified under Network Access (TA0001) where the attacker interacts with a service over the network to trigger the flaw in the web interface or API endpoints of the SIEM platform. This highlights the importance of securing management interfaces, which are often targeted by adversaries seeking initial access or privilege escalation within an organization's security infrastructure.
To mitigate this vulnerability and prevent exploitation, organizations running affected versions must prioritize immediate patching. The vendor has released version 6.4.122 which addresses the input validation logic to ensure that all path inputs are strictly confined to their intended directories. Until the software is updated, administrators should implement network-level controls such as firewall rules or Web Application Firewall (WAF) signatures that detect and block common path traversal patterns in HTTP requests directed at the SIEM management interface. Additionally, enforcing strict access control policies on the administrative console ensures that only authorized personnel can interact with potentially vulnerable endpoints. Regular security audits and penetration testing should be conducted to verify that input sanitization mechanisms are functioning correctly across all modules of the application, ensuring robust defense against directory traversal attacks in future updates or similar software components.