EUVD-2026-12597CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
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3Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 3.9.0 and prior to version 4.14.3, a privilege escalation vulnerability exists in the Wazuh Manager's cluster synchronization protocol. The `wazuh-clusterd` service allows authenticated nodes to write arbitrary files to the manager’s file system with the permissions of the `wazuh` system user. Due to insecure default permissions, the `wazuh` user has write access to the manager's main configuration file (`/var/ossec/etc/ossec.conf`). By leveraging the cluster protocol to overwrite `ossec.conf`, an attacker can inject a malicious `<localfile>` command block. The `wazuh-logcollector` service, which runs as root, parses this configuration and executes the injected command. This chain allows an attacker with cluster credentials to gain full Root Remote Code Execution, violating the principle of least privilege and bypassing the intended security model. Version 4.14.3 fixes the issue.
Analysis
Privilege escalation in Wazuh Manager versions 3.9.0 through 4.14.2 allows authenticated cluster nodes to achieve unauthenticated root code execution by exploiting insecure file permissions in the cluster synchronization protocol. An attacker with cluster node access can overwrite the manager's configuration file to inject malicious commands that are subsequently executed with root privileges by the logcollector service. …
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Remediation
Within 24 hours: Identify all Wazuh Manager instances and document their versions; restrict cluster credential access and rotate credentials if compromise is suspected; disable cluster synchronization if operationally feasible. Within 7 days: Implement network segmentation to isolate Wazuh cluster communications; enable audit logging for cluster node authentication and file modifications; assess whether insider threat or credential exposure has occurred. …
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