Wavlink WL-WN530BE1-A up to M30BE1_V251117 ioos protocol.csp sub_23B54 file_id os command injection

Summaryinfo

A vulnerability identified as very critical has been detected in Wavlink WL-WN530BE1-A up to M30BE1_V251117. Affected is the function sub_23B54 of the file protocol.csp of the component ioos. Performing a manipulation of the argument file_id results in os command injection. This vulnerability is cataloged as CVE-2026-113802. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Wavlink WL-WN530BE1-A up to M30BE1_V251117. This affects the function sub_23B54 of the file protocol.csp of the component ioos. The manipulation of the argument file_id with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Wavlink WL-WN530BE1-A firmware through M30BE1_V251117 contains an OS command injection vulnerability in the sub_23B54 function of the ioos binary, which passes the unsanitized file_id parameter of /protocol.csp?opt=ovpn_file requests with type=del to popen(). A remote unauthenticated attacker can send a forged IP-FROM: 127.0.0.1 header to bypass login and execute arbitrary commands as root.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-113802 since 10/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/20/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

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

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Productinfo

Vendor

• Wavlink

Name

• WL-WN530BE1-A

Version

• M30BE1_V251117

License

• commercial

CPE 2.3info

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CPE 2.2info

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