Critical 9.1Published Oct 13, 2026

CVE-2026-74040Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker

Updated under an hour ago (2026-10-19 06:30 UTC)

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It affects wazuh-manager. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.55%, higher than 45% of scored CVEs.

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Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.55% (percentile 45)
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 13, 2026

Affected products

Affected products

Wazuh wazuh-manager wazuh:manager (from the name)	from 3.9.0 before 4.14.8; 4.14.8 not affected	CNA record

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8vendor-advisory
https://github.com/wazuh/wazuh/releases/tag/v4.14.8patch, release-notes
https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-arbitrary-file-overwrite-rce-via-process-files-from-workerthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.