Detections
Analytics
Wazuh Server 3.9.0 < 4.14.5 DoS (CVE-2026-44253)
medium Nessus Plugin ID 339368
Synopsis
The remote host contains a threat prevention, detection, and response platform that is affected by a denial of service vulnerability.Description
The version of Wazuh Server on the remote host is at least 3.9.0 and prior to 4.14.5. It is, therefore, affected by a denial of service vulnerability:- The cluster protocol allows an authenticated cluster node to exhaust memory on the master. The receive_str() method accepts an attacker-controlled total for InBuffer without a maximum, and the divided-message path retains fragments without limits. Exploitation can disrupt agent connectivity and alert processing. (CVE-2026-44253)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Wazuh Server version 4.14.5 or later.See Also
Plugin Details
Severity: Medium
ID: 339368
File Name: wazuh_server_CVE-2026-44253.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Misc.
Published: 8/25/2026
Updated: 8/25/2026
Configuration: Enable thorough checks (optional)
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.65
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:N/A:C
CVSS Score Source: CVE-2026-44253
CVSS v3
Risk Factor: Medium
Base Score: 4.9
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Vulnerability Information
CPE: cpe:/a:wazuh:wazuh
Required KB Items: installed_sw/Wazuh-Manager
Patch Publication Date: 8/7/2026
Vulnerability Publication Date: 8/7/2026
Reference Information
CVE: CVE-2026-44253