CVE-2018-4063

Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type

8.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 27.1%

Published6 May 2019
Added to CISA KEV12 Dec 2025
Remediation due2 Jan 2026

Sierra Wireless AirLink ALEOS contains an unrestricted upload of file with dangerous type vulnerability. 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. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

Added to KEV: 12 Dec 2025Federal remediation due: 2 Jan 2026

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 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Sierrawireless Aleos< 4.11.0 · < 4.4.9 · < 4.9.4

Remediation

Fixed in

Sierrawireless Aleos≥ 4.11.0

References

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

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2018-4063 being actively exploited?

Yes. CVE-2018-4063 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 12 Dec 2025.

How severe is CVE-2018-4063?

CVE-2018-4063 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 27.1% probability of exploitation.

Which products are affected by CVE-2018-4063?

Affected products include Sierrawireless Aleos.

How do I fix CVE-2018-4063?

Upgrade affected software to a fixed version, for example Sierrawireless Aleos 4.11.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-4063 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.