CVE-2026-58457: Shenzhen Aitemi E Commerce Co. Ltd m300 Wi-Fi Repeater

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

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.

Affected products

• Shenzhen Aitemi E Commerce Co. Ltd m300 Wi-Fi Repeater: any version

Published 2026-07-01. Last modified 2026-07-06.