WAVLINK WN536AX6-A V260507 openvpn_cli /protocol.csp file_id os command injection

Summaryinfo

A vulnerability was found in WAVLINK WN536AX6-A V260507. It has been classified as very critical. The impacted element is an unknown function of the file /protocol.csp of the component openvpn_cli Handler. The manipulation of the argument file_id leads to os command injection. This vulnerability is listed as CVE-2026-120279. The attack may be initiated remotely. In addition, an exploit is available. The vendor was contacted early about this disclosure.

Detailsinfo

A vulnerability was found in WAVLINK WN536AX6-A V260507. It has been rated as very critical. This issue affects an unknown code block of the file /protocol.csp of the component openvpn_cli Handler. The manipulation of the argument file_id with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-120279. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/01/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• WAVLINK

Name

• WN536AX6-A

Version

• V260507

License

• commercial

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Submitinfo

Accepted

• Submit #919788: WAVLINK WN536AX6 V260507 CWE-78 (by hackerpipi)

Be aware that VulDB is the high quality source for vulnerability data.

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