High severity · published Dec 24, 2025
CVE-2018-25147
Microhard Systems IPn4G 1.1.0 Default Credentials Authentication Bypass
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Default Credentials · Microhard Systems
IPn4G 1.1.0 build 1098 · source: vendor
BF
Bullet-3g Firmware · Microhardcorp
1.2.0; 1.2.0 · source: NVD
BF
Bullet-lte Firmware · Microhardcorp
1.2.0 · source: NVD
BF
Bulletplus Firmware · Microhardcorp
1.3.0 · source: NVD
DF
Dragon-lte Firmware · Microhardcorp
1.1.0 · source: NVD
IF
Ipn3gb Firmware · Microhardcorp
2.2.0 · source: NVD
IF
Ipn3gii Firmware · Microhardcorp
1.2.0 · source: NVD
IF
Ipn4g Firmware · Microhardcorp
1.1.0 · source: NVD
IF
Ipn4gb Firmware · Microhardcorp
1.1.6; 1.1.0; 1.1.0 · source: NVD
IF
Ipn4gii Firmware · Microhardcorp
1.2.0 · source: NVD
VF
Vip4gb Firmware · Microhardcorp
1.1.6; 1.1.6 · source: NVD
VW
Vip4gb Wifi-n Firmware · Microhardcorp
1.1.6 · source: NVD
Affected product
MS
Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Default Credentials
Microhard Systems