CVE-2025-34286Network attack vector

Authenticated command execution via CCM parameter injection

Published Oct 30, 2025 · Updated Oct 30, 2025

OS command injection in Nagios XI before 2026R1 allows remote authenticated users with administrator access to execute arbitrary commands. CCM Run Check insufficiently validates or escapes parameters before incorporating them into backend shell command lines, allowing shell metacharacters to alter execution. Successful exploitation runs commands as the web application user and can lead to control of the underlying Linux host.

CVSS severity9.4
Critical
EPSS probability2.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Nagios XI before 2026R1 allows remote authenticated users with administrator access to execute arbitrary commands. CCM Run Check insufficiently validates or escapes parameters before incorporating them into backend shell command lines, allowing shell metacharacters to alter execution. Successful exploitation runs commands as the web application user and can lead to control of the underlying Linux host.

The record

CVE
CVE-2025-34286
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
Nagios Enterprises, LLC
Product
Nagios XI
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026R1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Nagios Enterprises, LLC · Nagios XIversion=0 <2026R1

Published CVSS scores

9.4VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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