CVE-2018-4063

Name: CVE-2018-4063
Creator: NVD / NIST
Published: 2019-05-06T19:29:00.637+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 28.06%

Last modified Jun 17, 2026

CVE-2018-4063 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 28.06% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

28.06%

97.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jan 2, 2026.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sierrawireless	Aleos	< 4.4.9
Sierrawireless	Aleos	< 4.11.0
Sierrawireless	Aleos	< 4.9.4

References

http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.htmlExploit, VDB Entry
http://www.securityfocus.com/bid/108147Broken Link
https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03Third Party Advisory, US Government Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748Exploit, Third Party Advisory
http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.htmlExploit, VDB Entry
http://www.securityfocus.com/bid/108147Broken Link
https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03Third Party Advisory, US Government Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748Exploit, Third 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/Exploit, Third Party Advisory

Timeline

Published: May 6, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-4063?

How severe is CVE-2018-4063?

CVE-2018-4063 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 28.06% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-4063?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4063?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST