CVE-2018-4063

HIGH8.8

CISA KEV

Published 2019-05-06 · Updated 2026-06-17 · Source talos-cna@cisco.com

Summary

CVE-2018-4063 is a high-severity (CVSS 8.8) vulnerability in Sierra Wireless AirLink ALEOS. CISA added it to the Known Exploited Vulnerabilities catalog on December 12, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by January 2, 2026. CISA does not currently list it as used in ransomware campaigns.

All 1 known-exploited Sierra Wireless vulnerabilities →

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.

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

CWE-434CWE-434

CISA Known-Exploited Vulnerability

Product: Sierra Wireless — AirLink ALEOS

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

Date added: 2025-12-12 · Due: 2026-01-02

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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