CVE-2018-25147: Microhard Systems IPn4G 1.1.0 contains hardcoded default credentials that cannot be changed through normal gat

This week

HIGH 7.5REMOTEMITIGATEMITIGATEMITIGATE

CVE-2018-25147 is a high-severity flaw (CVSS 7.5) affecting ipn4g firmware, ipn3gb firmware, ipn4gb firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Microhard Systems IPn4G 1.1.0 contains hardcoded default credentials that cannot be changed through normal gateway operations. Attackers can exploit these default credentials to gain unauthorized root-level access to the device by logging in with predefined username and password combinations.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-1392
Published	2025-12-24
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: microhardcorp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-24 20:15 UTCPublished CVE record published
2026-06-17 01:54 UTCUpdated Record last modified

microhardcorp ipn4g firmware MITIGATE

Affected: 1.1.0 build1098

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microhardcorp ipn3gb firmware MITIGATE

Affected: 2.2.0 build2160

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microhardcorp ipn4gb firmware MITIGATE

Affected: 1.1.6 build1184-14 · 1.1.0 rev2_build1090-2 · 1.1.0 rev2_build1086

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microhardcorp bullet-3g firmware MITIGATE

Affected: 1.2.0 reva_build1032 · 1.2.0 build1076

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microhardcorp vip4gb firmware MITIGATE

Affected: 1.1.6 build_1204 · 1.1.6 rev3_build1184-14

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microhardcorp vip4gb wifi-n firmware MITIGATE

Affected: 1.1.6 rev2_build1196

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-25147?

ipn4g firmware: mitigate or apply the listed mitigation; ipn3gb firmware: mitigate or apply the listed mitigation; ipn4gb firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-25147 being exploited?

CVE-2018-25147 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-25147 affect?

CVE-2018-25147 affects ipn4g firmware, ipn3gb firmware, ipn4gb firmware. Severity is high (CVSS 7.5). Microhard Systems IPn4G 1.1.0 contains hardcoded default credentials that cannot be changed through normal gateway operations. Attackers can exploit these default credentials to gain unauthorized root-level access to the device by logging i

How urgent is CVE-2018-25147?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Wi-Fi vulnerabilities

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References

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