CVE-2026-74040 Wazuh - Remote Code Execution

Wazuh >= 3.9.0 < 4.14.8 contains an arbitrary file overwrite vulnerability caused by trailing-slash basename bypass and missing extra_valid enforcement in MasterHandler.process_files_from_worker, letting cluster workers achieve root remote code execution, exploit requires attacker control of a cluster worker.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.55% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution, File System Write
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-862

Vendor fix

Update to version 4.14.8 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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