CVE-2018-4063

Sierra Wireless

Published 6 May 2019 · updated 17 Jun 2026 · Analyzed

8.8 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 12 Dec 2025, with a remediation deadline of 2 Jan 2026 for US federal agencies.

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.

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.

References

packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html · Exploit, VDB Entry
www.securityfocus.com/bid/108147 · Broken Link
ics-cert.us-cert.gov/advisories/ICSA-19-122-03 · Third Party Advisory, US Government Resource
talosintelligence.com/vulnerability_reports/TALOS-2018-0748 · Exploit, Third Party Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063 · US Government Resource
www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/ · Exploit, Third Party Advisory