WAVLINK WN553X1-B V260403_2.0.0 ioos Service /bin/ioos sub_416D88 group_id/group_name os command injection

Summaryinfo

A vulnerability marked as very critical has been reported in WAVLINK WN553X1-B V260403_2.0.0. This issue affects the function sub_416D88 of the file /bin/ioos of the component ioos Service. The manipulation of the argument group_id/group_name leads to os command injection. This vulnerability is uniquely identified as CVE-2026-120228. The attack is possible to be carried out remotely. Moreover, an exploit is present. The vendor was contacted early about this disclosure.

Detailsinfo

A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. It has been rated as very critical. This issue affects the function sub_416D88 of the file /bin/ioos of the component ioos Service. The manipulation of the argument group_id/group_name 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-2026-120228. The exploitation is known to be easy. The attack may be initiated remotely. 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 10/31/2026). 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.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• WAVLINK

Name

• WN553X1-B

Version

• V260403_2.0.0

License

• commercial

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Submitinfo

Accepted

• Submit #919151: Wavlink Router Firmware V260403_2.0.0 Authenticated Command Injection (by shuyi)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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