CVE-2026-16471 in Sonlogger
Summary
by MITRE • 08/17/2026
Missing Authorization vulnerability in Dolusoft Software Technologies Sonlogger allows Accessing Functionality Not Properly Constrained by ACLs.
This issue affects Sonlogger: from v6.6.6 before 6.7.4.8.
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Analysis
by VulDB Data Team • 08/17/2026
The identified security flaw within Dolusoft Software Technologies' Sonlogger application represents a critical failure in access control mechanisms, specifically categorized under the Common Weakness Enumeration as CWE-285 Improper Authorization. This vulnerability exists in versions ranging from 6.6.6 up to, but not including, version 6.7.4.8. The core technical issue stems from an insufficient enforcement of Access Control Lists or similar authorization policies on specific application endpoints and functions. In a properly secured system, every request for sensitive data or administrative actions must be validated against the user's permissions before execution. However, in this affected software version, certain functionalities can be invoked by authenticated users who lack the necessary privileges to perform those actions. This indicates that while basic authentication may be present, the subsequent authorization checks are either missing, bypassable, or incorrectly implemented for specific API endpoints or internal application routes.
From a technical perspective, this type of vulnerability often arises when developers assume that client-side restrictions or initial login states are sufficient to prevent unauthorized access. In reality, an attacker can manipulate HTTP requests directly using tools such as Burp Suite or OWASP ZAP to target these unprotected functions. By altering parameters in the request payload or changing the URL path to point to administrative endpoints, a low-privilege user can escalate their effective permissions within the application. This bypass of access controls allows the actor to perform actions that should be restricted to administrators or higher-level users. The flaw is particularly dangerous because it does not require complex exploitation techniques; rather, it relies on the fundamental principle that security decisions must always be made and enforced server-side without relying on client trust.
The operational impact of this vulnerability is significant for organizations deploying Sonlogger in production environments where data integrity and role-based access are critical. If an attacker successfully exploits this missing authorization flaw, they may gain unauthorized access to sensitive configuration settings, view confidential project data, or modify system parameters that could disrupt service availability. In the context of industrial monitoring software like Sonlogger, which is often used for environmental sensing and logging in potentially hazardous environments, such a breach could lead to tampering with sensor configurations or alarm thresholds. This poses not only a risk to information confidentiality but also to operational safety and integrity. An adversary could alter logged data to hide malicious activity or trigger false alarms that disrupt normal operations, leading to potential financial loss and reputational damage for the organization relying on this software.
This vulnerability aligns with several tactics in the MITRE ATT&CK framework, particularly those related to Privilege Escalation and Defense Evasion. Specifically, it relates to techniques where an attacker exploits improper access control to move laterally within a network or escalate privileges from a standard user account to an administrative one. The lack of proper constraint on functionality allows for unauthorized modification of system state, which falls under the broader category of Impact tactics if data is altered, or Collection if sensitive information is exfiltrated through these elevated permissions. Recognizing this pattern helps security teams understand that the root cause is not a complex code injection but a logical flaw in how user roles and permissions are mapped to application functions.
To mitigate this vulnerability, organizations must immediately upgrade Sonlogger to version 6.7.4.8 or later, where Dolusoft Software Technologies has addressed these access control deficiencies. For environments that cannot be patched instantly due to operational constraints, temporary mitigations should include restricting network access to the Sonlogger interface to only trusted IP addresses and ensuring that all administrative interfaces are not exposed directly to untrusted networks via reverse proxies with strict ACLs. Additionally, implementing Web Application Firewalls can help detect and block anomalous requests that attempt to access unauthorized endpoints by monitoring for patterns consistent with privilege escalation attempts. Regular security audits focusing on role-based access control implementation across the application lifecycle will also prevent similar issues in future updates. It is imperative that development teams adopt a defense-in-depth strategy, ensuring that every function call is validated against current user permissions regardless of how the request was initiated or what client-side restrictions are in place.