CVE-2018-25143 | Microhard Systems IPn4G 1.1.0 Backdoor Jailbreak via Microhard Sh Service

Exp

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.

Published: 2025-12-24 Last update: 2026-01-26 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-25143 is rated High Exploit Risk (64/100): CVSS High severity, with low exploitation likelihood (EPSS 0.52%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-25143

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-25143

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.16% 0.52% +0.35%
2 2026-06-03 0.14% 0.16% +0.02%
3 2026-05-22 — 0.14% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-25143

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.7 4.0 HIGH
CVSS: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 Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:P)
A user has to participate (for example click/open/approve).
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H)
High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:X)
Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:X)
Not evaluated.
Recovery (supplemental) (R:X)
Not evaluated.
Value density (supplemental) (V:X)
Not evaluated.
Vulnerability response effort (supplemental) (RE:X)
Not evaluated.
Provider urgency (supplemental) (U:X)
Not evaluated.
 — — [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2018-25143

Affected software / configurations for CVE-2018-25143

Vendor Product Version Raw CPE
microhardcorp ipn4g_firmware 1.1.0 cpe:2.3:o:microhardcorp:ipn4g_firmware:1.1.0:build1098:*:*:*:*:*:*
microhardcorp ipn3gb_firmware 2.2.0 cpe:2.3:o:microhardcorp:ipn3gb_firmware:2.2.0:build2160:*:*:*:*:*:*
microhardcorp ipn4gb_firmware 1.1.6 cpe:2.3:o:microhardcorp:ipn4gb_firmware:1.1.6:build1184-14:*:*:*:*:*:*
microhardcorp ipn4gb_firmware 1.1.0 cpe:2.3:o:microhardcorp:ipn4gb_firmware:1.1.0:rev2_build1090-2:*:*:*:*:*:*
microhardcorp ipn4gb_firmware 1.1.0 cpe:2.3:o:microhardcorp:ipn4gb_firmware:1.1.0:rev2_build1086:*:*:*:*:*:*
microhardcorp bullet-3g_firmware 1.2.0 cpe:2.3:o:microhardcorp:bullet-3g_firmware:1.2.0:reva_build1032:*:*:*:*:*:*
microhardcorp vip4gb_firmware 1.1.6 cpe:2.3:o:microhardcorp:vip4gb_firmware:1.1.6:build_1204:*:*:*:*:*:*
microhardcorp vip4gb_firmware 1.1.6 cpe:2.3:o:microhardcorp:vip4gb_firmware:1.1.6:rev3_build1184-14:*:*:*:*:*:*
microhardcorp vip4gb_wifi-n_firmware 1.1.6 cpe:2.3:o:microhardcorp:vip4gb_wifi-n_firmware:1.1.6:rev2_build1196:*:*:*:*:*:*
microhardcorp bullet-3g_firmware 1.2.0 cpe:2.3:o:microhardcorp:bullet-3g_firmware:1.2.0:build1076:*:*:*:*:*:*
microhardcorp bullet-lte_firmware 1.2.0 cpe:2.3:o:microhardcorp:bullet-lte_firmware:1.2.0:build1078:*:*:*:*:*:*
microhardcorp ipn3gii_firmware 1.2.0 cpe:2.3:o:microhardcorp:ipn3gii_firmware:1.2.0:build1076:*:*:*:*:*:*
microhardcorp ipn4gii_firmware 1.2.0 cpe:2.3:o:microhardcorp:ipn4gii_firmware:1.2.0:build1078:*:*:*:*:*:*
microhardcorp bulletplus_firmware 1.3.0 cpe:2.3:o:microhardcorp:bulletplus_firmware:1.3.0:build1036:*:*:*:*:*:*
microhardcorp dragon-lte_firmware 1.1.0 cpe:2.3:o:microhardcorp:dragon-lte_firmware:1.1.0:build1036:*:*:*:*:*:*

References for CVE-2018-25143

cvelogic Threat Intelligence