# CVE-2018-4063: Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type

> An attacker with valid credentials can upload executable files via the web interface, leading to remote code execution on the device.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 12 Dec 2025 (CISA KEV)
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 May 2019
- **Updated:** 22 May 2026
- **Also known as:** GHSA-96pr-35f4-cf4c

## What is CVE-2018-4063?

CVE-2018-4063 is a high-severity vulnerability in Sierra Wireless, published on 6 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially crafted HTTP request can upload a file, resulting in executable code being uploaded, and routable, to the webserver. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2018-4063?

It affects 1 product.


Products: Sierrawireless Aleos.

## How do I fix CVE-2018-4063?

No fix has been published for CVE-2018-4063 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 2 Jan 2026.

## Is CVE-2018-4063 being exploited?

Yes. Attackers have exploited CVE-2018-4063 in the wild since at least 12 Dec 2025.

## Other vulnerabilities in Sierra Wireless

- [CVE-2015-2897](https://insights.sbomify.com/CVE-2015-2897/): Hardcoded credentials in n/a (critical 10.0)
- [CVE-2019-11851](https://insights.sbomify.com/CVE-2019-11851/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-10251](https://insights.sbomify.com/CVE-2018-10251/): Missing authorization in n/a (critical 9.8)
- [CVE-2019-11857](https://insights.sbomify.com/CVE-2019-11857/): ALEOS AceManager Information Disclosure (critical 9.1)
- [CVE-2022-46649](https://insights.sbomify.com/CVE-2022-46649/): Command injection in ALEOS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-4063 and fix it if it is affected.

What it is: CVE-2018-4063 is a high-severity vulnerability in Sierra Wireless, published on 6 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2018-4063 in the wild since at least 12 Dec 2025.

Affected product: Sierra Wireless. 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-2018-4063/ (Markdown: https://insights.sbomify.com/CVE-2018-4063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-4063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-4063
- OSV: https://osv.dev/vulnerability/CVE-2018-4063

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-4063/
Summaries are generated and may contain mistakes; the official description above is the record.