CVE-2026-90925 in Logsign
Summary
by MITRE • 09/28/2026
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Innotim Software, Telecommunications and Consultancy Trade Ltd. Co. Logsign SIEM allows Path Traversal.
This issue affects Logsign SIEM: from 6.4.101 before 6.4.117.
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Analysis
by VulDB Data Team • 09/28/2026
The identified vulnerability represents a critical security flaw within the Logsign Security Information and Event Management (SIEM) platform, specifically affecting versions ranging from 6.4.101 up to but not including version 6.4.117. This issue is classified as an Improper Limitation of a Pathname to a Restricted Directory, commonly known in industry terminology as path traversal or directory traversal. The core technical flaw stems from insufficient validation and sanitization of user-supplied input that dictates file system paths within the application logic. When the SIEM processes requests involving file access operations, it fails to adequately neutralize special elements such as dot-dot-slash sequences (.. /) or other operating-system-specific path manipulation characters. This oversight allows an attacker to manipulate the intended directory structure by injecting these malicious sequences into input fields that are subsequently passed to underlying system calls for reading files.
From a technical perspective, this vulnerability exploits the way the application resolves relative paths against absolute base directories. Instead of strictly confining file access operations to a predefined secure root directory, the software interprets traversal characters as instructions to move up one or more levels in the hierarchical file structure. Consequently, an authenticated attacker can construct specific HTTP requests that direct the SIEM server to read arbitrary files from the underlying operating system. This capability bypasses standard application-level access controls because the vulnerability exists at the input validation layer before security policies are enforced against the resolved absolute path. The impact is severe as it grants unauthorized entities the ability to exfiltrate sensitive configuration files, credential stores, database connection strings, and potentially other proprietary data stored on the server hosting the SIEM infrastructure.
The operational impact of this vulnerability extends beyond simple data leakage. By accessing critical system files, an attacker may gain insights into the internal architecture, network topology, and security configurations of the organization deploying Logsign SIEM. This information can be leveraged for further reconnaissance or to craft more sophisticated attacks against other components within the enterprise environment. Furthermore, depending on the specific file types accessible through this flaw, there is a potential risk of remote code execution if the attacker can write malicious content into writable directories that are later executed by system services or scripts managed by the SIEM platform. This transforms a simple information disclosure vulnerability into a potentially critical threat vector capable of compromising the entire security monitoring infrastructure.
In terms of industry standard classifications, this flaw aligns with CWE-22: Improper Limitation of a Pathname to a Restricted Directory within the Common Weakness Enumeration framework. It also maps to specific tactics in the MITRE ATT&CK matrix, particularly T1083: File and Directory Discovery, which describes how adversaries search for files and directories on compromised systems to gather information necessary for subsequent phases of an attack such as credential theft or lateral movement. The vulnerability underscores a fundamental failure in input validation practices that are critical for any application interacting with the file system.
To mitigate this risk, organizations running affected versions of Logsign SIEM must prioritize immediate patching. Upgrading to version 6.4.117 or later resolves the underlying code defects responsible for the improper path handling. Until an upgrade can be performed, administrators should implement strict network-level access controls to restrict exposure of the SIEM interface to only trusted management networks and authorized personnel. Additionally, deploying Web Application Firewalls with rules specifically designed to detect and block path traversal sequences may provide a temporary layer of defense by intercepting malicious requests before they reach the application logic. Regular audits of input validation mechanisms across all enterprise applications are recommended to prevent similar vulnerabilities from being introduced in future updates or other software components.