CVE-2018-25123

Local privilege escalation via overprivileged MRTG processes

Published Oct 30, 2025 · Updated Oct 30, 2025

Privilege escalation in the MRTG graphing component of Nagios XI before 5.5.7 allows local users to gain elevated OS privileges. Before the fix, MRTG-related processes and scripts ran with excessive privileges while exposing file or command execution paths and writable resources. Limited local system access is required, and successful abuse elevates the user's OS privileges rather than exposing a remote attack path.

CVSS severity8.5
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in the MRTG graphing component of Nagios XI before 5.5.7 allows local users to gain elevated OS privileges. Before the fix, MRTG-related processes and scripts ran with excessive privileges while exposing file or command execution paths and writable resources. Limited local system access is required, and successful abuse elevates the user's OS privileges rather than exposing a remote attack path.

The record

CVE
CVE-2018-25123
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
Nagios Enterprises, LLC
Product
Nagios XI
Classifications
CWE-250, CAPEC-69, T1068
Attack vector
local
Privileges
authenticated

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 <5.5.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Nagios Enterprises, LLC · Nagios XIversion=0 <5.5.7

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-250Execution with Unnecessary Privileges
CAPEC-69Target Programs with Elevated Privileges
T1068Exploitation for Privilege Escalation

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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