Shenzhen Aitemi E Commerce M300 Wi-Fi Repeater Commuos Web Backend sprintf os command injection

Summaryinfo

A vulnerability has been found in Shenzhen Aitemi E Commerce M300 Wi-Fi Repeater and classified as critical. The impacted element is the function sprintf of the component Commuos Web Backend. This manipulation causes os command injection. The identification of this vulnerability is CVE-2026-58457. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as very critical was found in Shenzhen Aitemi E Commerce M300 Wi-Fi Repeater (the affected version unknown). Affected by this vulnerability is the function sprintf of the component Commuos Web Backend. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Shenzhen Aitemi M300 Wi-Fi Repeater (hardware model MT02) contains an unauthenticated OS command injection vulnerability that allows network-adjacent attackers to execute arbitrary shell commands by injecting unsanitized input through the smacfilter_conf handler in the commuos web backend. Attackers can append semicolon-delimited payloads to the name, enable, or mac GET parameters, which are passed without sanitization into sprintf() to build uci shell commands executed via doSystemCmdComlib(), granting full root-level control of the device.

The weakness was shared by Conrad Franke. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-58457 since 06/30/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/02/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

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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Vendor

• Shenzhen Aitemi E Commerce

Name

• M300 Wi-Fi Repeater

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