CVE-2018-25147Public exploitNetwork attack vector

Unauthenticated root access via immutable default credentials

Published Dec 24, 2025 · Updated Dec 24, 2025

Use of default credentials in Microhard Systems IPn4G 1.1.0 build 1098 allows remote attackers to gain root access over network services. The embedded Linux image ships privileged root, admin, testlab, testlab1, and msshc accounts with fixed passwords that normal gateway operations cannot change. No existing account or user interaction is required, and successful login grants privileged control of the appliance.

CVSS severity9.3
Critical
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of default credentials in Microhard Systems IPn4G 1.1.0 build 1098 allows remote attackers to gain root access over network services. The embedded Linux image ships privileged root, admin, testlab, testlab1, and msshc accounts with fixed passwords that normal gateway operations cannot change. No existing account or user interaction is required, and successful login grants privileged control of the appliance.

The record

CVE
CVE-2018-25147
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
Microhard Systems Inc.
Product
IPn4G
Classifications
CWE-1392, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=IPn4G 1.1.0 build 1098

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microhard Systems Inc. · IPn4Gversion=IPn4G 1.1.0 build 1098

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1392Use of Default Credentials
T1078.001Valid Accounts: Default Accounts

Public exploit references

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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