High severity · published May 6, 2019
CVE-2018-4063
Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability
In wildKEV
8.8
CVSS
27.3%
EPSS
Yes
On KEV
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
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)27.3% · higher than 98% of CVEs
Exploited in the wildYes
CISA KEVListed Dec 12, 2025
Federal remediation dueJan 2, 2026
Ransomware campaign useNot known
Affected products
Which versions
SW
Sierra Wireless ·
Sierra Wireless AirLink ES450 FW 4.9.3 · source: vendor
AL
Aleos · Sierrawireless
before 4.4.9; before 4.11.0; before 4.9.4 · source: NVD
AA
AirLink ALEOS · Sierra Wireless
All versions, or not specified · source: KEV
In the news
VulnerabilityHigh
[CISA KEV] CVE-2018-4063: Sierra Wireless AirLink ALEOS - Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability
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.
AAAirLink ALEOSCVE-2018-4063
Dec 12, 2025·CISA KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-4063
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-4063
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
x_refsource_MISC
https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
vdb-entry
http://www.securityfocus.com/bid/108147
x_refsource_MISC
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748