# CVE-2026-4584: Shenzhen HCC Technology MPOS M6 PLUS Cardholder Data cleartext transmission

> Attackers on the local network can intercept cardholder data transmitted in cleartext by the MPOS M6 PLUS terminal.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Mar 2026
- **Updated:** 23 Mar 2026
- **Also known as:** GHSA-vmxp-224r-5qhc

## What is CVE-2026-4584?

CVE-2026-4584 is a low-severity vulnerability in Shenzhen HCC Technology MPOS M6 PLUS, published on 23 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw has been found in Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N. This affects an unknown part of the component Cardholder Data Handler. Executing a manipulation can lead to cleartext transmission of sensitive information. The attack requires access to the local network. The attack requires a high level of complexity. It is indicated that the exploitability is difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information), CWE-310

## Which versions are affected by CVE-2026-4584?


## How do I fix CVE-2026-4584?

No fix has been published for CVE-2026-4584 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4584 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4584 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4584 and fix it if it is affected.

What it is: CVE-2026-4584 is a low-severity vulnerability in Shenzhen HCC Technology MPOS M6 PLUS, published on 23 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4584 exists.

Affected product: Shenzhen HCC Technology MPOS M6 PLUS. 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-2026-4584/ (Markdown: https://insights.sbomify.com/CVE-2026-4584/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4584
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4584
- OSV: https://osv.dev/vulnerability/CVE-2026-4584

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-4584/
Summaries are generated and may contain mistakes; the official description above is the record.