CVE-2025-34286 CRITICAL

CVE-2025-34286: Nagios XI < 2026R1 RCE via Run Check Command in CCM

Vendor Nagios
Product XI
Weakness CWE-78
Published October 30, 2025
Last update May 14, 2026

CVSS base score

9.4/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

What the vulnerability does

01Description

Nagios XI versions prior to 2026R1 contain a remote code execution vulnerability in the Core Config Manager (CCM) Run Check command. Insufficient validation/escaping of parameters used to build backend command lines allows an authenticated administrator to inject shell metacharacters that are executed on the server. Successful exploitation results in arbitrary command execution with the privileges of the Nagios XI web application user and can be leveraged to gain control of the underlying host operating system.

Key dates

02Disclosure timeline

October 30, 2025 CVE published
May 14, 2026 Record updated