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Vulnerabilities

Vulnerability · CVE-2026-2042

Nagios Host monitoringwizard Command Injection Remote Code Execution Vulnerability.

Published Feb 20, 2026 · catalog updated Jun 17, 2026 · nagios xi

Check if you run it

No confirmed exploitation is on record for CVE-2026-2042. EPSS is 5.73%. Act only if a listed version of nagios xi is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
5.73%
Remediation
Advisory link
Affected products
cpe nagios/nagios xi

Nagios Host monitoringwizard 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 monitoringwizard module. 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-28245.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe nagios/nagios xi2026

How to fix CVE-2026-2042

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-2042. EPSS is 5.73%. Act only if a listed version of nagios xi is installed.

Which versions are affected?

Compare what you have installed with nagios/nagios xi 2026. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 5.73%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 20, 2026 · NIST NVD

    Detected

    Nagios Host monitoringwizard 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 monitoringwizard module. The issue results from the lack of proper validation of a user-supplied string before

  2. Jun 17, 2026 · NIST NVD

    Updated

    Nagios Host monitoringwizard 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 monitoringwizard module. The issue results from the lack of proper validation of a user-supplied string before

Sources

  • CVE.orgVulnerability recordCVE-2026-2042

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-2042

    30-day exploitation probability 5.7%

    first.org
  • NIST NVDVulnerability recordCVE-2026-2042

    Nagios Host monitoringwizard 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 w

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.