by Kastro
Paper/Archive/CVE-2026-74040

CVE-2026-74040

Wazuh wazuh-manager — Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker

EPSS 0.7%public exploitCVSS 9.4
critical.is priorityof 100
49
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 53.7.537 × 2010.7Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
wazuh-manager3.9.0 – < 4.14.84.14.8CNA

Scores by source

VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8patchgithub.com/wazuh/wazuh/releases/tag/v4.14.8writeupvulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-arbitrary-file-overwrite-rce-via-process-files-from-worker