# CVE-2026-120276: WAVLINK WN536AX6-A OS command injection in web management interface

Source: https://junglewise.ai/threats/cve-2026-120276-a-weakness-has-been-identified-in-wavlink-wn536ax6-a-v260507-2-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-120276 · Severity: critical · CVSS 10 · Published 2026-11-02

The WAVLINK WN536AX6-A is a WiFi router whose web management interface contains a command injection vulnerability in the OpenVPN configuration handler. An attacker can send a specially crafted request to execute arbitrary commands as root, achieving complete device compromise. The vulnerability can be exploited remotely on factory-default devices without authentication.

Technologies: [Wavlink WN536AX6-A](https://junglewise.ai/threats/technologies/wn536ax6-a). Vendors: [Wavlink](https://junglewise.ai/threats/vendors/wavlink).

## Quick answers

**Is CVE-2026-120276 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120276 being exploited in the wild.

**How severe is CVE-2026-120276?** Critical severity, with a CVSS score of 10, published 2 November 2026.

**Which products and versions are affected?** Wavlink WN536AX6-A V260507_2.0.0.

**Is there a fix for CVE-2026-120276?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-120276 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-120276?** Check whether you run Wavlink WN536AX6-A at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The /bin/ioos web backend (running as root) improperly sanitizes the group_name parameter in the openvpn_cli_group handler, passing it unsanitized into a system() call within single quotes. An attacker can break out of the quoted context with a payload like a';CMD;' to inject arbitrary shell commands. The ioos daemon trusts requests from 127.0.0.1 without token validation, and factory-default devices accept empty passwords, enabling unauthenticated remote exploitation.

## Affected products

- WAVLINK WN536AX6-A V260507_2.0.0

## Timeline

- 2026-11-02: disclosed
- exploited: Proof of concept publicly available on GitHub

## References

- [https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md](https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md)
- [https://vuldb.com/cve/CVE-2026-120276](https://vuldb.com/cve/CVE-2026-120276)

## Related threats

- [WAVLINK WN536AX6-A command injection in host_black handler](https://junglewise.ai/threats/cve-2026-120282-a-vulnerability-was-determined-in-wavlink-wn536ax6-a-v260507)
- [WAVLINK WN536AX6-A stack buffer overflow in OpenVPN handler](https://junglewise.ai/threats/cve-2026-120281-a-vulnerability-was-found-in-wavlink-wn536ax6-a-v260507-this)
- [WAVLINK WN536AX6 OS command injection in OpenVPN handler](https://junglewise.ai/threats/cve-2026-120279-a-flaw-has-been-found-in-wavlink-wn536ax6-a-v260507-the-affected)
- [WAVLINK WN536AX6-A authentication bypass in VPN client handler](https://junglewise.ai/threats/cve-2026-120278-a-vulnerability-was-detected-in-wavlink-wn536ax6-a-v260507-2-0-0)
- [WAVLINK WN536AX6-A OS command injection in WireGuard CLI handler](https://junglewise.ai/threats/cve-2026-120277-a-security-vulnerability-has-been-detected-in-wavlink-wn536ax6-a)