CVE-2018-25143

Microhard Systems IPn4G 1.1.0 Backdoor Jailbreak via Microhard Sh Service

Microhard Systems IPn4G 1.1.0 contains a service vulnerability that allows authenticated users to enable a restricted SSH shell with a default 'msshc' user. Attackers can exploit a custom 'ping' command in the NcFTP environment to escape the restricted shell and execute commands with root privileges.

Affected

Microhard Systems · Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Backdoor Jailbreak

CVSS v4.0 VULNCHECK

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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

CVSS v3.1 VULNCHECK

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.60% chance of exploitation in the next 30 days, 48th percentile

Published

2025-12-24

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/45041

Security advisories

• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5486.php
• http://www.microhardcorp.com

References

• CVE Record
• NVD entry