CVE-2026-74040

CRITICAL 9.1

Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

Wazuh versions from 3.9.0 before 4.14.8 contain an arbitrary file overwrite vulnerability in MasterHandler.process_files_from_worker allowing a cluster worker to overwrite protected master files. Attackers controlling a worker can use a trailing-slash basename bypass and missing extra_valid enforcement to overwrite ossec.conf and agent.conf, achieving root remote code execution across the manager and every agent.

CWE	CWE-862
Vendor	wazuh
Product	wazuh-manager
Published	Oct 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Wazuh / wazuh-manager

3.9.0 < 4.14.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8 github.com: https://github.com/wazuh/wazuh/releases/tag/v4.14.8 vulncheck.com: https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-arbitrary-file-overwrite-rce-via-process-files-from-worker

Credits

🔍 TarPeg007 vikman90