CVE-2018-25147

Microhard Systems IPn4G 1.1.0 Default Credentials Authentication Bypass

Critical9.3EPSS 0.39%

Published: 24 Dec 2025
Updated: 28 Jul 2026
Reserved: 24 Dec 2025
Assigned by: VulnCheck

Description

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.

Scores

CVSS scores of CVE-2018-25147, by who scored it
Scored by	CVSS	Score	Vector
VulnCheckCNA (assigner)	4.0	Critical9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheckCNA (assigner)	3.1	High7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVDNVD · Analyzed	4.0	Critical9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.39% · top 67% of all CVEs (4 Nov 2026)
CISA SSVC: Exploitation: poc · Automatable: yes · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.

Weakness

CWE-1392: Use of Default Credentials (opens in a new tab)All about CWE-1392 and its CVEs

Affected products

Microhard Systems · Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Default Credentials
- affected IPn4G 1.1.0 build 1098

References (3)

ExploitDB-45040 (opens in a new tab)exploit
Microhard Systems Product Homepage (opens in a new tab)product
Zero Science Lab Disclosure (ZSL-2018-5480) (opens in a new tab)third-party-advisoryexploit

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated 28 Jul 2026, 01:46 UTC.