Is CVE-2026-120238 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-120238 being exploited in the wild.

How severe is CVE-2026-120238?

Critical severity, with a CVSS score of 9.9, published 1 November 2026.

Which products and versions are affected?

Wavlink WN553X1-B 260403_2.0.0.

Is there a fix for CVE-2026-120238?

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-2026-120238 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-120238?

Check whether you run Wavlink WN553X1-B 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.

CVE-2026-120238: WAVLINK WN553X1-B command injection in ovpn_file handler

CVE-2026-120238 · Severity: critical · CVSS 9.9 · Published 2026-11-01

WAVLINK WN553X1-B routers contain a command injection vulnerability in the OpenVPN file management function that allows authenticated attackers to execute arbitrary system commands with root privileges. Since the device ships with a hardcoded default password, an attacker with network access can log in and compromise the router completely, potentially intercepting network traffic or using it as a foothold to attack connected devices.

Technologies: Wavlink WN553X1-B. Vendors: Wavlink.

Quick answers

Is CVE-2026-120238 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-120238 being exploited in the wild.
How severe is CVE-2026-120238?: Critical severity, with a CVSS score of 9.9, published 1 November 2026.
Which products and versions are affected?: Wavlink WN553X1-B 260403_2.0.0.
Is there a fix for CVE-2026-120238?: 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-2026-120238 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-120238?: Check whether you run Wavlink WN553X1-B 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 vulnerability is an authenticated command injection in the ovpn_file handler (sub_4162A8 function of /bin/ioos). When a POST request with function=set and type=del is processed, the user-supplied file_id parameter is embedded into a command string passed to popen without sanitization. An attacker can break out of the quoted string with a payload like a";COMMAND;" to execute arbitrary OS commands with root privileges.

Affected products

WAVLINK WN553X1-B 260403_2.0.0

Timeline

2026-11-01: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.