---
id: CVE-2026-19348
title: >-
  A security flaw has been discovered in Shenzhen Aitemi M300 Wi-Fi Repeater
  r0-ea7890a
summary: >-
  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 manipul…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-74
  - CWE-77
published: '2026-08-09'
updated: '2026-08-09'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19348'
references:
  - url: 'https://github.com/IEATASICS/m300-repeater-bugs'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-19348'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/865682'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/865683'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/865684'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/387184'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/387184/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-08-09T18:34:00.905Z'
epss: 0.01973
epssPercentile: 0.79585
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.