Remote Code Execution Flaw in Nagios Host by Nagios
CVE-2026-2043

7.2HIGH

Key Information:

Vendor

NagiOS

Status
Host
Vendor
CVE Published:
20 February 2026

What is CVE-2026-2043?

A command injection vulnerability exists within the esensors_websensor_configwizard_func method of Nagios Host, which allows remote attackers to execute arbitrary code due to improper validation of input. Authentication is required to exploit this weakness, enabling attackers to run code within the service account's context, potentially compromising the system's integrity and security.

Affected Version(s)

Host 2026R1

References

https://www.zerodayinitiative.com/advisories/ZDI-26-072/
x_research-advisory
https://www.nagios.com/changelog/nagios-xi/nagios-xi-2026...
vendor-advisory

EPSS Score

72% chance of being exploited in the next 30 days.

CVSS V3.0

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.