CVE-2026-2043
Received Received - Intake
Command Injection in Nagios Host esensors_websensor_configwizard_func

Publication date: 2026-02-20

Last updated on: 2026-02-24

Assigner: Zero Day Initiative

Description
Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Nagios Host. Authentication is required to exploit this vulnerability. The specific flaw exists within the esensors_websensor_configwizard_func method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-28249.
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Meta Information
Published
2026-02-20
Last Modified
2026-02-24
Generated
2026-06-16
AI Q&A
2026-02-21
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2043
EUVD
EUVD-2026-7770
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
nagios nagios_xi 2026
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

This vulnerability is a command injection remote code execution flaw in Nagios Host, specifically in the esensors_websensor_configwizard_func method. It occurs because the software does not properly validate a user-supplied string before using it to execute a system call. An attacker who is authenticated can exploit this flaw to execute arbitrary code on the affected system with the privileges of the service account.

Impact Analysis

If exploited, this vulnerability allows an authenticated attacker to execute arbitrary code remotely on the affected Nagios Host system. This can lead to full compromise of the service account running Nagios Host, potentially allowing the attacker to manipulate system operations, access sensitive data, disrupt services, or use the system as a foothold for further attacks.

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