CVE-2026-82041 in UTMStack
Summary
by MITRE • 10/03/2026
UTMStack before 11.2.16 contains a missing authorization vulnerability in UTMIncidentCommandWebsocket.processCommand(), the handler mapped to the /command/{hostname} STOMP destination, where no role check or command allowlist is applied before forwarding supplied commands. Any authenticated user, regardless of role, can send arbitrary operating-system commands over gRPC to any connected agent, resulting in command execution on monitored endpoints where agent processes commonly run as root or SYSTEM.
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Analysis
by VulDB Data Team • 10/03/2026
The vulnerability identified in UTMStack versions prior to 11.2.16 represents a critical failure in access control mechanisms within the incident management subsystem. Specifically, the flaw resides in the processCommand method of the UTMIncidentCommandWebsocket class, which handles incoming commands via STOMP protocol destinations mapped to /command/{hostname}. This architectural component is designed to facilitate remote command execution on monitored endpoints through agent processes that typically operate with elevated privileges, such as root or SYSTEM. The core technical deficiency lies in the absence of any role-based access control checks or command allowlisting before these supplied inputs are forwarded over gRPC channels to the target agents. Consequently, the system fails to validate whether the authenticated user possesses the necessary administrative permissions to execute operational commands on remote hosts.
This missing authorization vulnerability allows any authenticated user, regardless of their assigned role within the UTMStack environment, to inject and execute arbitrary operating-system commands on connected endpoints. Because the agent processes commonly run with full system privileges to perform comprehensive monitoring and security tasks, successful exploitation results in complete compromise of the affected systems. An attacker can leverage this flaw to bypass intended administrative boundaries, effectively gaining unrestricted control over the underlying operating system without requiring elevated credentials or exploiting additional software flaws. The lack of input validation regarding command syntax further exacerbates the risk by enabling a wide range of malicious activities beyond simple execution, including data exfiltration, lateral movement within the network, and persistence establishment through backdoors or scheduled tasks.
From an industry standard perspective, this vulnerability aligns with CWE-269, which classifies Improper Privilege Control where software does not properly assign privileges to actors based on their roles. Furthermore, in terms of tactical mapping under the MITRE ATT&CK framework, this flaw facilitates techniques associated with Initial Access and Command and Control, specifically allowing adversaries to use legitimate system utilities for remote execution after gaining initial foothold through compromised credentials or weak authentication policies. The ability to send arbitrary commands over a network service like STOMP/gRPC also touches upon aspects of CWE-749, where exposed dangerous API functions are accessible by unauthorized actors due to insufficient access control checks.
The operational impact of this vulnerability is severe, as it undermines the fundamental security posture provided by centralized management platforms. Security teams rely on these systems to enforce policies and respond to incidents; if an attacker can execute commands directly through the incident command interface, they can disable logging mechanisms, alter configuration files, or install malware with high confidence that their actions will not be immediately detected by standard privilege escalation alerts. This creates a significant risk for organizations using UTMStack as part of their security operations center infrastructure, potentially leading to widespread data breaches and system downtime across all monitored endpoints connected to the compromised instance.
Mitigation strategies must prioritize immediate patching to version 11.2.16 or later where these authorization checks have been implemented by the vendor. In environments where upgrading is not immediately feasible, network segmentation should be enforced to restrict access to the STOMP and gRPC interfaces exclusively from trusted management subnets with strict IP whitelisting. Additionally, implementing a Web Application Firewall capable of inspecting STOMP payloads for suspicious command patterns can provide an additional layer of defense against exploitation attempts. It is also critical to enforce strong authentication policies, including multi-factor authentication, to reduce the likelihood of credential compromise that would be required to trigger this vulnerability in the first place. Regular audits of user roles and permissions within the UTMStack administration console should be conducted to ensure that only authorized personnel have access to incident management features.