CVE-2026-89202 in Ruggedcom Crossbow
Summary
by MITRE • 10/13/2026
A vulnerability has been identified in RUGGEDCOM CROSSBOW (All versions < V6.0). Affected devices do not properly perform authorization checks for device disconnection requests. This could allow an authenticated attacker with minimal privileges to disconnect active sessions of other users, including administrators, leading to a denial of service.
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Analysis
by VulDB Data Team • 10/13/2026
The identified vulnerability in RUGGEDCOM CROSSBOW versions prior to V6.0 represents a critical failure in access control mechanisms within the device management interface. Specifically, the flaw resides in the authorization logic governing session termination requests. The system fails to verify whether the user initiating a disconnection request possesses the requisite privileges to terminate sessions belonging to other users. This deficiency allows an authenticated attacker with minimal or standard user privileges to execute administrative-level actions by targeting active connections of higher-privileged accounts, including those held by administrators.
From a technical perspective, this issue is classified as Broken Access Control, which corresponds to CWE-269 in the Common Weakness Enumeration taxonomy. The vulnerability exploits the lack of proper object level authorization checks when processing device disconnection commands. Instead of validating that the requester has ownership or elevated rights over the target session, the application blindly processes the request based on its structural validity rather than its contextual permissions. This allows for a horizontal privilege escalation where a low-privileged user can effectively perform actions reserved for high-privileged roles by manipulating session identifiers associated with other users.
The operational impact of this vulnerability is significant, primarily manifesting as a Denial of Service condition against administrative personnel and potentially disrupting critical network operations. By disconnecting active sessions of administrators, the attacker prevents legitimate management access to the industrial control system or router. This can lead to an inability to monitor network status, apply security patches, or respond to other incidents in real-time. In industrial environments where RUGGEDCOM devices are deployed, such disruptions can compromise the availability and reliability of critical infrastructure components, potentially leading to operational downtime or safety risks depending on the specific application context.
This behavior aligns with tactics observed in the MITRE ATT&CK framework under the Initial Access and Persistence categories, specifically relating to Session Manipulation techniques like T1078 Valid Accounts combined with actions that disrupt service availability. While the attacker does not gain direct code execution or data exfiltration capabilities through this specific flaw alone, the ability to lock out administrators creates a window of opportunity for further exploitation if other vulnerabilities exist on the device. It effectively degrades the security posture by removing the primary defense mechanism: administrative oversight and control.
To mitigate this vulnerability, organizations must upgrade RUGGEDCOM CROSSBOW devices to version V6.0 or later where these authorization checks have been properly implemented. Until an upgrade is feasible, network segmentation should be enforced to restrict management interface access only to trusted IP addresses and administrators. Additionally, implementing strict role-based access control policies and monitoring for unusual session termination events can help detect potential abuse of this flaw. Regular audits of user privileges ensure that minimal privilege principles are strictly adhered to, reducing the attack surface available to low-privileged users who might attempt such exploits.