Nagios
CVE-2026-2042
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Nagios Host
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DeliveryAccess monitoringwizard module
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ExploitInject malicious payload in user input
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ExecutionExecute arbitrary system command
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ImpactGain code execution as service account
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK
2 techniques across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Valid authentication credentials required. Attacker must have user-level access to Nagios Host and interact with the monitoringwizard module, which accepts unsanitized command-line parameters. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to execute arbitrary code on affected installations of Nagios Host. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in Nagios Xi's monitoringwizard module allows authenticated attackers to execute arbitrary commands through insufficient input validation in system calls. An attacker with valid credentials can exploit this command injection vulnerability to gain code execution with service account privileges on affected installations. No patch is currently available for this high-severity vulnerability.
Earlier versions of this analysis (1)
Nagios Host monitoringwizard Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Nagios Host. [CVSS 8.8 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-78 (OS Command Injection). Affects the monitoringwizard component of 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 t
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
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.
Zero Day Initiative Advisories
Executive ViewAI
Nagios Host monitoring infrastructure is vulnerable to unauthenticated remote code execution with a CVSS score of 8.8, allowing attackers to gain full system control without a patch currently available. This poses an immediate threat to organizations relying on Nagios for critical infrastructure monitoring, potentially compromising visibility into production systems and enabling lateral movement across the enterprise.
Restrict network access to Nagios Host via firewall rules and VPN requirements; disable the monitoring wizard functionality if not operationally critical; implement Web Application Firewall (WAF) rules to block command injection patterns in HTTP requests; enable enhanced logging and alerting for suspicious monitoring wizard activity; segment Nagios infrastructure from critical production systems; deploy intrusion detection system (IDS) signatures targeting CVE-2026-2042 exploitation attempts.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
Multiple stack-based buffer overflows in the get_history function in history.cgi in Nagios Core before 3.4.4, and Icinga
Incomplete blacklist vulnerability in nrpc.c in Nagios Remote Plug-In Executor (NRPE) before 2.14 might allow remote att
Nagios XI version xi-5.7.5 is affected by cross-site scripting (XSS). Rated medium severity (CVSS 6.1), this vulnerabili
Multiple off-by-one errors in Nagios Core 3.5.1, 4.0.2, and earlier, and Icinga before 1.8.5, 1.9 before 1.9.4, and 1.10
MagpieRSS, as used in the front-end component in Nagios Core before 4.2.2 might allow remote attackers to read or write
Snoopy 1.0 in Nagios XI 5.5.6 allows remote unauthenticated attackers to execute arbitrary commands via a crafted HTTP r
SQL injection vulnerability in the core config manager in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an attacker
Authentication bypass vulnerability in the core config manager in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an
A path traversal vulnerability exists in Nagios XI below version 5.8.5 AutoDiscovery component and could lead to post au
GitHub PoC
Exploit-DB