The LB-Link BL-CPE300M AX300 4G LTE Router firmware version BL-R8800_B10_ALK_SL_V01.01.02P42U14_06 does not implement proper session handling. After a user authenticates from a specific IP address, the router grants access to any other client using that same IP, without requiring credentials or verifying client identity. There are no session tokens, cookies, or unique identifiers in place. This flaw allows an attacker to obtain full administrative access simply by configuring their device to use the same IP address as a previously authenticated user. This results in a complete authentication bypass.
References
| Link | Resource |
|---|---|
| https://www.lb-link.com/CPE300M-AX300-4G-LTE-Router-pd502775568.html | Product |
| https://www.zyenra.com/blog/improper-ip-bound-session-authentication-in-lb-link-cpe300m | Exploit Third Party Advisory |
Configurations
Configuration 1 (hide)
| AND |
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History
10 Oct 2025, 17:56
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:lb-link:bl-cpe300m_firmware:-:*:*:*:*:*:*:* cpe:2.3:h:lb-link:bl-cpe300m:-:*:*:*:*:*:*:* |
|
| First Time |
Lb-link bl-cpe300m Firmware
Lb-link bl-cpe300m Lb-link |
|
| References | () https://www.lb-link.com/CPE300M-AX300-4G-LTE-Router-pd502775568.html - Product | |
| References | () https://www.zyenra.com/blog/improper-ip-bound-session-authentication-in-lb-link-cpe300m - Exploit, Third Party Advisory |
22 Sep 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-287 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.8 |
09 Sep 2025, 19:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-09 19:15
Updated : 2025-10-10 17:56
NVD link : CVE-2025-57278
Mitre link : CVE-2025-57278
CVE.ORG link : CVE-2025-57278
JSON object : View
Products Affected
lb-link
- bl-cpe300m
- bl-cpe300m_firmware
CWE
CWE-287
Improper Authentication