Skip to content
Noroxi
CVE-2018-25147· NVD / CVE Program· CNA VulnCheck

Microhard Systems IPn4G 1.1.0 Default Credentials Authentication Bypass

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.

CriticalCVSS 9.3 · v4.0—No exploit No fix recorded
Published
Dec 24, 2025
Updated
Jul 28, 2026
EPSS
0.4% · 30th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

37

Monitor

Low priority for now.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
9.3
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
microhardcorpipn4g firmware
microhardcorpipn4g
microhardcorpipn3gb firmware
microhardcorpipn3gb
microhardcorpipn4gb firmware
microhardcorpipn4gb
microhardcorpbullet-3g firmware
microhardcorpbullet-3g
microhardcorpvip4gb firmware
microhardcorpvip4gb
microhardcorpvip4gb wifi-n firmware
microhardcorpvip4gb wifi-n

and 10 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microhardcorp bullet-3g firmware1.2.0
  • microhardcorp bullet-lte firmware1.2.0
  • microhardcorp bulletplus firmware1.3.0
  • microhardcorp dragon-lte firmware1.1.0
  • microhardcorp ipn3gb firmware2.2.0
  • microhardcorp ipn3gii firmware1.2.0
  • microhardcorp ipn4g firmware1.1.0
  • microhardcorp ipn4gb firmware1.1.0
  • microhardcorp ipn4gb firmware1.1.6
  • microhardcorp ipn4gii firmware1.2.0
  • microhardcorp vip4gb firmware1.1.6
  • microhardcorp vip4gb wifi-n firmware1.1.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • Microhard Systems Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Default Credentials

    • IPn4G 1.1.0 build 1098affected

Same product

microhardcorp: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-25148Microhard Systems IPn4G 1.1.0 Remote Code Execution via Admin Interface
    34Monitor
  • CVE-2018-25144Microhard Systems IPn4G 1.1.0 Arbitrary File Access via Undocumented System Editor
    34Monitor
  • CVE-2018-25143Microhard Systems IPn4G 1.1.0 Backdoor Jailbreak via Microhard Sh Service
    34Monitor
  • CVE-2018-25146Microhard Systems IPn4G 1.1.0 Service Control Denial of Service
    28Monitor
  • CVE-2018-25145Microhard Systems IPn4G 1.1.0 Configuration Disclosure via Authenticated Download
    28Monitor
  • CVE-2018-25149Microhard Systems IPn4G 1.1.0 Cross-Site Request Forgery via Web Interface
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2018-251440 days apartMicrohard Systems IPn4G 1.1.0 Arbitrary File Access via Undocumented System Editor
    34Monitor
  • CVE-2018-251480 days apartMicrohard Systems IPn4G 1.1.0 Remote Code Execution via Admin Interface
    34Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-1392 · Use of Default Credentials

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records