Arbitrary File Overwrite Vulnerability in Wazuh by Wazuh
CVE-2026-74040

9.4CRITICAL

Key Information:

Vendor

Wazuh

Status
Wazuh-manager
Vendor
CVE Published:
13 October 2026

What is CVE-2026-74040?

Wazuh versions from 3.9.0 to 4.14.7 are vulnerable to an arbitrary file overwrite exploit, specifically in the MasterHandler.process_files_from_worker function. This flaw allows an attacker controlling a cluster worker to manipulate protected master files, facilitating the potential for root remote code execution by overwriting configuration files such as ossec.conf and agent.conf. Exploitation of this vulnerability can compromise the integrity and security of the Wazuh manager and connected agents.

Affected Version(s)

wazuh-manager 3.9.0 < 4.14.8

wazuh-manager 4.14.8

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-8...
vendor-advisory
https://github.com/wazuh/wazuh/releases/tag/v4.14.8
patchrelease-notes
https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4...
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

TarPeg007
vikman90
.