Wazuh up to 4.14.6 Enrollment w_enrollment_process_agent_key null pointer dereference

Summaryinfo

A vulnerability was found in Wazuh up to 4.14.6 and classified as critical. The impacted element is the function w_enrollment_process_agent_key of the component Enrollment. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2026-54084. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Wazuh up to 4.14.6. Affected is the function w_enrollment_process_agent_key of the component Enrollment. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.0.0 through 4.14.6, a malicious or man-in-the-middle enrollment manager can crash a Wazuh agent during enrollment by returning a malformed key response with fewer than four fields, causing a NULL pointer dereference. The  w_enrollment_process_agent_key()  routine splits the manager-provided key into four space-separated fields but does not verify that all fields are present before passing them to validators. Because OS_StrBreak() leaves missing trailing entries as NULL and OS_IsValidName() calls strlen() on its argument without a NULL check, a response such as  OSSEC K:'1'  reaches OS_IsValidName(NULL) and terminates the agent process. Since Wazuh permits enrollment against an unverified manager when no CA certificate is configured, an attacker operating a rogue manager or intercepting the enrollment flow can deterministically crash agents, resulting in denial of service. This issue is fixed in version 4.14.7.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-54084 since 06/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

Upgrading to version 4.14.7 eliminates this vulnerability.

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Productinfo

Name

• Wazuh

Version

• 4.14.0
• 4.14.1
• 4.14.2
• 4.14.3
• 4.14.4
• 4.14.5
• 4.14.6

Website

• Product: https://github.com/wazuh/wazuh/

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