# CVE-2026-58457: Shenzhen Aitemi M300 MT02 Unauthenticated OS Command Injection via protocol.csp

> Network-adjacent attackers can execute arbitrary root-level shell commands on Shenzhen Aitemi M300 Wi-Fi Repeaters via unsanitized input in the web backend.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jul 2026
- **Updated:** 6 Jul 2026
- **Also known as:** GHSA-gfhx-3hfg-x9hv

## What is CVE-2026-58457?

CVE-2026-58457 is a critical command injection vulnerability in Shenzhen Aitemi E Commerce Co. Ltd. M300 Wi-Fi Repeater, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-58457?


## How do I fix CVE-2026-58457?

No fix has been published for CVE-2026-58457 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-58457 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58457 exists.

Public exploit code:

- PoC tools for CVE-2026-58457: Unauthenticated OS Command Injection leading to remote root on Shenzhen Aitemi M300 Wi-Fi Repeater (MT02). Includes exploit, validator, payload generator, and Metasploit module. For educational and authorized pentesting only. (github_poc): https://github.com/J4ck3LSyN-Gen2/CVE-2026-58457

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58457 and fix it if it is affected.

What it is: CVE-2026-58457 is a critical command injection vulnerability in Shenzhen Aitemi E Commerce Co. Ltd. M300 Wi-Fi Repeater, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58457 exists.

Affected product: Shenzhen Aitemi E Commerce Co. Ltd. M300 Wi-Fi Repeater. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-58457/ (Markdown: https://insights.sbomify.com/CVE-2026-58457/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58457
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58457
- OSV: https://osv.dev/vulnerability/CVE-2026-58457

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-58457/
Summaries are generated and may contain mistakes; the official description above is the record.