CVE-2026-19348: Shenzhen Aitemi M300 Wi-Fi Repeater protocol.csp sprintf command injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-09 · updated 2026-10-23
Weakness: CWE-74

Description

A security flaw has been discovered in Shenzhen Aitemi M300 Wi-Fi Repeater r0-ea7890a. Impacted is the function sprintf of the file /protocol.csp?fname=net&opt=smacfilter_conf&function=set&act=add&name=test&enable=1. Performing a manipulation of the argument enable/name/mac results in command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.

Affected products

Shenzhen Aitemi M300 Wi-Fi Repeater: r0-ea7890a

References

https://github.com/IEATASICS/m300-repeater-bugs
https://vuldb.com/cve/CVE-2026-19348
https://vuldb.com/submit/865682
https://vuldb.com/submit/865683
https://vuldb.com/submit/865684
https://vuldb.com/vuln/387184
https://vuldb.com/vuln/387184/cti

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