CVE-2026-74040

9.1Critical

Published 13 Oct 2026 · NVD status: Awaiting Analysis

9.1Critical

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-862

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CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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NVD description

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.

References

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

Source: nvd.nist.gov/vuln/detail/CVE-2026-74040