Detections
Analytics

Wazuh Server 4.5.0 < 4.14.6 Stack Buffer Overflow (CVE-2026-45798)

high Nessus Plugin ID 339369

Synopsis

The remote host contains a threat prevention, detection, and response platform that is affected by a stack buffer overflow vulnerability.

Description

The version of Wazuh Server on the remote host is at least 4.5.0 and prior to 4.14.6. It is, therefore, affected by a stack buffer overflow vulnerability:

 - compare_wazuh_versions() copies the attacker-controlled enrollment V: field into a 10-byte stack buffer without explicit null termination. A remote unauthenticated attacker can cause a denial of service via wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. (CVE-2026-45798)

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 4.14.6 or later.

See Also

http://www.nessus.org/u?d211a23b

Plugin Details

Severity: High

ID: 339369

File Name: wazuh_server_CVE-2026-45798.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: High

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-45798

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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-2026-45798

CWE: 121, 170