SB20260213139 - Multiple vulnerabilities in Nagios XI

Description

This security bulletin contains information about 3 vulnerabilities.

1) Command Injection (CVE-ID: CVE-2026-2042)

CWE-ID: CWE-77 - Command injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to execute arbitrary commands on the system.

The vulnerability exists due to insufficient input validation within the monitoringwizard module. A remote administrator can pass specially crafted data to the application and execute arbitrary commands.

2) Command Injection (CVE-ID: CVE-2026-2041)

CWE-ID: CWE-77 - Command injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to execute arbitrary commands on the system.

The vulnerability exists due to insufficient input validation within the zabbixagent_configwizard_func method. A remote administrator can pass specially crafted data to the application and execute arbitrary commands.

3) Command Injection (CVE-ID: CVE-2026-2043)

CWE-ID: CWE-77 - Command injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to execute arbitrary commands on the system.

The vulnerability exists due to insufficient input validation within the esensors_websensor_configwizard_func method. A remote administrator can pass specially crafted data to the application and execute arbitrary commands.

Remediation

Install update from vendor's website.

References

• https://www.zerodayinitiative.com/advisories/ZDI-26-071/
• https://www.nagios.com/changelog/nagios-xi/nagios-xi-2026r1-0-1/
• https://www.zerodayinitiative.com/advisories/ZDI-26-073/
• https://www.zerodayinitiative.com/advisories/ZDI-26-072/