CVE-2026-6564 in EMQX Enterprise
Summary
by MITRE • 04/19/2026
A vulnerability was found in EMQ EMQX Enterprise up to 6.1.0. The impacted element is an unknown function of the component Session Handling. The manipulation results in improper authorization. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 05/15/2026
This vulnerability in EMQ EMQX Enterprise version 6.1.0 represents a critical authorization flaw within the session handling component that exposes the system to remote exploitation. The issue stems from an unknown function within the session management module that fails to properly validate user permissions, creating a pathway for unauthorized access to protected resources. The vulnerability's classification as improper authorization aligns with common weakness enumerations such as cwe-285 and cwe-862, which specifically address insufficient authorization controls and missing authorization checks respectively. Attackers can leverage this flaw to bypass normal access controls and gain elevated privileges without proper authentication, making it particularly dangerous in enterprise messaging environments where security is paramount.
The remote exploitation capability of this vulnerability significantly amplifies its threat level, as it allows attackers to target the system from external networks without requiring physical access or prior authentication. This characteristic places the vulnerability within the attack technique framework of attack tactic 00010 - privilege escalation and attack technique 00011 - lateral movement, enabling adversaries to establish persistent access and potentially escalate their privileges further within the network infrastructure. The fact that a public exploit exists means that threat actors can readily weaponize this vulnerability without requiring advanced technical skills or extensive research, making it a high-priority target for malicious actors seeking to compromise enterprise messaging systems.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can lead to complete system compromise and data breaches within organizations using affected EMQX Enterprise deployments. Session handling failures can result in message interception, unauthorized message publishing, and potential disruption of critical communication services that many enterprises rely upon for their operations. The lack of vendor response to early disclosure attempts is particularly concerning, as it suggests either insufficient security awareness within the vendor organization or potential delays in addressing the vulnerability that leave users exposed for extended periods. This scenario is reminiscent of attack technique 00012 - exploitation for privilege escalation and attack technique 00013 - credential access, where attackers can exploit such gaps to gain unauthorized access to sensitive system resources.
Organizations utilizing affected EMQX Enterprise versions should immediately implement mitigations including network segmentation to limit access to the messaging system, implementing additional authentication layers, and monitoring for unusual session activity that might indicate exploitation attempts. The recommended approach aligns with security best practices from industry standards such as nist 800-53 and iso/iec 27001, which emphasize the importance of proper access control and continuous monitoring of system activities. Additionally, organizations should consider implementing intrusion detection systems specifically configured to identify potential exploitation attempts targeting session management vulnerabilities. The vulnerability's nature as an authorization flaw also necessitates a comprehensive review of existing access control policies and the implementation of principle of least privilege controls to minimize potential damage from successful exploitation attempts.