Advisory Details

February 12th, 2026

Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability

CVE ID	CVE-2026-2043
CVSS SCORE	7.2, AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Nagios
AFFECTED PRODUCTS	Host
VULNERABILITY DETAILS	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.
ADDITIONAL DETAILS	Nagios has issued an update to correct this vulnerability. More details can be found at: https://www.nagios.com/changelog/nagios-xi/nagios-xi-2026r1-0-1/
DISCLOSURE TIMELINE	2025-10-08 - Vulnerability reported to vendor 2026-02-12 - Coordinated public release of advisory 2026-02-12 - Advisory Updated
CREDIT	Vladislav Berghici of Trend Research

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