What’s Vulnerable › Vulnerabilities

CVE-2026-2043: Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 75.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-20 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• Nagios XI: 2026-r1

References

• https://www.nagios.com/changelog/nagios-xi/nagios-xi-2026r1-0-1/
• https://www.zerodayinitiative.com/advisories/ZDI-26-072/

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