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CVE-2026-61800

Wazuh remote code execution

9.1 CRITICALPublic exploitEPSS 0.98%
  1. Published28 Aug 2026

Description

Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.4.0 through 4.14.6, a party holding the cluster key can write, overwrite, or delete arbitrary files under /var/ossec on worker nodes, leading to remote code execution as root. During cluster file synchronization, the non-merged branch of update_master_files_in_worker() moves each staged file to a destination derived only from safe_join(), which confines the path to /var/ossec but never verifies that the file lands in the directory declared by its cluster_item_key. Because the destination check present on the primary node and on the worker's merged branch was not applied, a peer can place files at attacker-chosen locations under /var/ossec, including paths that are executed as root, and the delete branch has the same gap. This is an incomplete fix for CVE-2026-30893, which addressed traversal outside /var/ossec but left this path able to redirect files anywhere within it. This issue is fixed in version 4.14.7.

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≥ 4.4.0 < 4.14.7

Remediation

Fixed in
Wazuh≥ 4.14.7

References

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Frequently asked

Is CVE-2026-61800 being actively exploited?

CVE-2026-61800 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.98%.

How severe is CVE-2026-61800?

CVE-2026-61800 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.98% probability of exploitation.

Which products are affected by CVE-2026-61800?

Affected products include Wazuh.

How do I fix CVE-2026-61800?

Upgrade affected software to a fixed version, for example Wazuh 4.14.7 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.