CVE-2026-2042 Nagios Host monitoringwizard Command Injection Remote Code Execution Vulnerability
Remote attackers with authentication can execute arbitrary code via command injection in the Nagios Host monitoringwizard module.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2042?
CVE-2026-2042 is a high-severity command injection vulnerability in Nagios Nagios Xi, published on 20 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-2042?
It affects 1 product.
Products include Nagios Nagios Xi.
How do I fix CVE-2026-2042?
No fix has been published for CVE-2026-2042 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-2042 being exploited?
There is no known exploitation of CVE-2026-2042 in the wild and no public exploit code.
Other vulnerabilities in Nagios Nagios Xi
Sources
Also known as GHSA-rwr9-9r33-h7x4.