CVE-2026-121024 in AxxonNet
Summary
by MITRE • 11/03/2026
Incorrect Authorization (CWE-863) in the Health Monitoring service in AxxonSoft AxxonNet before 3.28.0 on Linux allows a remote attacker in possession of a shared report token, which is intended for read-only access, to create, modify or delete monitoring alerts via the monitoring API.
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Analysis
by VulDB Data Team • 11/03/2026
The vulnerability identified as CWE-863 represents an incorrect authorization flaw within the Health Monitoring service of AxxonSoft AxxonNet versions prior to 3.28.0 running on Linux operating systems. This security defect fundamentally undermines the principle of least privilege by failing to enforce strict access control boundaries between different user roles and permission levels. Specifically, the system incorrectly processes requests related to monitoring alerts when authenticated via a shared report token. These tokens are explicitly designed for read-only operations, allowing users or automated scripts to view health status data without altering it. However, due to insufficient validation of the request context against the specific permissions granted by the token, the application erroneously accepts write operations such as creation, modification, and deletion of monitoring alerts through the monitoring API endpoint.
From a technical perspective, this flaw indicates that the backend logic handling HTTP requests does not adequately verify whether the current authentication credential possesses the necessary privileges for the requested action. Instead of checking if the token is restricted to read-only access before processing write commands, the service likely relies on insufficient checks or assumes all authenticated users have broader permissions than intended. This allows a remote attacker who has obtained possession of such a shared report token to bypass security controls and execute administrative-level functions. The attack vector is network-based, requiring no physical proximity or local system access, making it particularly dangerous in environments where these tokens might be exposed through logs, configuration files, or improper sharing practices among team members.
The operational impact of this vulnerability is significant for the integrity and reliability of surveillance and monitoring systems managed by AxxonNet. An attacker can manipulate monitoring alerts to create false positives, which may trigger unnecessary responses from security teams or automated systems, leading to alert fatigue and potential desensitization to genuine threats. Conversely, an attacker could delete existing critical alerts, effectively blinding the system to ongoing issues or intrusions. This capability also enables data tampering, where historical records of health status are altered to hide evidence of previous incidents or to frame specific events. In a security operations center context, this compromises the trustworthiness of the monitoring infrastructure and can lead to severe operational disruptions if automated workflows depend on accurate alert states.
This vulnerability aligns with ATT&CK technique T1078, Valid Accounts, as it involves using legitimate credentials that are misused for unauthorized actions. It also relates to T1562, Impair Defenses, specifically through the disabling or modification of monitoring mechanisms. The core issue falls under CWE-863, Incorrect Authorization, which describes situations where an actor is able to access resources or perform functions they should not be allowed to do based on their assigned role or token permissions. To mitigate this risk, organizations must upgrade AxxonNet to version 3.28.0 or later, where the authorization logic has been corrected to strictly enforce read-only restrictions for shared report tokens. Additionally, administrators should review access control policies to ensure that shared tokens are issued with minimal necessary privileges and rotated regularly to limit the window of exposure if a token is compromised. Implementing strict input validation on all API endpoints and auditing request origins can further reduce the attack surface associated with such authorization flaws.