---
title: "CVE-2018-4063: Sierra Wireless vulnerability | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2018-4063
---

# CVE-2018-4063: Sierra Wireless vulnerability | CubePath

## 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.

Official description from the CVE record, published by talos. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-4063)

## Key data

### CVSS 3.1 High 8.8

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | Low       | A basic user account is needed.                                                     |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | High      | Serious or total effect on the secrecy of data.                                     |
| Integrity impact       | High      | Serious or total effect on the trustworthiness of data.                             |
| Availability impact    | High      | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.27260 (27.3% probability)

Percentile

98.1%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability

Added to the catalog

Dec 12, 2025

Federal due date

Jan 2, 2026

### CISA assessment as of Dec 13, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-434](https://cwe.mitre.org/data/definitions/434.html) Unrestricted Upload of File with Dangerous Type

## Affected products

Products listed in the CVE record, as the CNA published them.

- Sierra Wireless

  - affected: Sierra Wireless AirLink ES450 FW 4.9.3

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [packetstormsecurity.com/files/152648/Sierra-Wireless-AirLin…](http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html)
- [ics-cert.us-cert.gov/advisories/ICSA-19-122-03](https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03)
- [108147](http://www.securityfocus.com/bid/108147)  (securityfocus.com) vdb-entry
- [talosintelligence.com/vulnerability\_reports/TALOS-2018-0748](https://talosintelligence.com/vulnerability%5Freports/TALOS-2018-0748)

## Timeline

1. ID reserved Jan 2, 2018
2. Record published May 6, 2019
3. Added to CISA KEV Dec 12, 2025
4. Record last updated May 22, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:14 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)