# CVE-2019-7256: Nice Linear eMerge E3-Series OS Command Injection

> Attackers can execute arbitrary commands on Linear eMerge E3-Series devices due to improper neutralization of special elements.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 25 Mar 2024 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Jul 2019
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-24pq-phfq-785f

## What is CVE-2019-7256?

CVE-2019-7256 is a critical command injection vulnerability in n/a, published on 2 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Linear eMerge E3-Series devices allow Command Injections.

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

## Which versions are affected by CVE-2019-7256?

It affects 2 products.


Products: Nortekcontrol Linear Emerge Elite Firmware, Nortekcontrol Linear Emerge Essential Firmware.

## How do I fix CVE-2019-7256?

No fix has been published for CVE-2019-7256 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2024.

## Is CVE-2019-7256 being exploited?

Yes. Attackers have exploited CVE-2019-7256 in the wild since at least 25 Mar 2024.

Public exploit code:

- Linear eMerge E3-Series Access Controller Command Injection (metasploit)
- eMerge E3 1.00-06 - Remote Code Execution (exploitdb)
- eMerge E3 1.00-06 - Remote Code Execution (nuclei): http/cves/2019/CVE-2019-7256.yaml

## Other vulnerabilities in n/a

- [CVE-2019-7257](https://insights.sbomify.com/CVE-2019-7257/): File upload in n/a (critical 10.0)
- [CVE-2019-7252](https://insights.sbomify.com/CVE-2019-7252/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2019-7253](https://insights.sbomify.com/CVE-2019-7253/): Path traversal in n/a (critical 9.8)
- [CVE-2019-7260](https://insights.sbomify.com/CVE-2019-7260/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2019-7261](https://insights.sbomify.com/CVE-2019-7261/): Hardcoded credentials in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-7256 and fix it if it is affected.

What it is: CVE-2019-7256 is a critical command injection vulnerability in n/a, published on 2 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2019-7256 in the wild since at least 25 Mar 2024.

Affected product: n/a. 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-2019-7256/ (Markdown: https://insights.sbomify.com/CVE-2019-7256/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-7256
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-7256
- OSV: https://osv.dev/vulnerability/CVE-2019-7256

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-7256/
Summaries are generated and may contain mistakes; the official description above is the record.