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CVE-2026-2043

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.

Scores

8.8
CVSS 8.8 out of 10, high severity.
75.4%
EPSS 75.4% chance of exploitation in the next 30 days.

The facts

Published
20 February 2026
Last changed
17 June 2026
NVD status
Analyzed
Severity
High, CVSS 8.8 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
Affects
  • nagios nagios xi
Known exploited
Not in the CISA Known Exploited Vulnerabilities catalogue in this build.
EPSS
75.4% chance of exploitation activity in the next 30 days (percentile 100).

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References