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CVE-2026-25770

Wazuh remote code execution

9.1 CRITICALPublic exploitEPSS 0.99%
  1. Published17 Mar 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Wazuh≥ 3.9.0 < 4.14.3

Remediation

Fixed in
Wazuh≥ 4.14.3

References

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Frequently asked

Is CVE-2026-25770 being actively exploited?

CVE-2026-25770 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.99%.

How severe is CVE-2026-25770?

CVE-2026-25770 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.99% probability of exploitation.

Which products are affected by CVE-2026-25770?

Affected products include Wazuh.

How do I fix CVE-2026-25770?

Upgrade affected software to a fixed version, for example Wazuh 4.14.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.