What is CVE-2026-2042?

CVE-2026-2042 is a high-severity vulnerability in Nagios Host, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-02-20.

How severe is CVE-2026-2042?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Nagios Host

CVE-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 v…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.055 (92.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Nagios Host — versions 2026R1
Nagios Nagios_xi — versions 2026

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

zdi-disclosures@trendmicro.com (x_research-advisory, Third Party Advisory)
zdi-disclosures@trendmicro.com (Product, vendor-advisory, Release Notes)

Frequently asked questions

What is CVE-2026-2042?: CVE-2026-2042 is a high-severity vulnerability in Nagios Host, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-02-20.
How severe is CVE-2026-2042?: High severity. CVSS v3 base score is 8.8 out of 10.