CVE-2018-4063 KEV
8.8
HIGH · CVSS 3.1 · EPSS 27.1% (pctl 98)
Patch first
On CISA KEV — known exploited in the wild, due 2026-01-02.
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.
Scoring
| CVSS | 8.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 27.06% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-434 |
| On CISA KEV | yes — remediate by 2026-01-02 |
| Public exploit | none known |
| Published | 2019-05-06 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability |
|---|---|
| Added | 2025-12-12 |
| Due | 2026-01-02 |
| Vendor / product | Sierra Wireless / AirLink ALEOS |
| Ransomware use | none reported |
Affected (13)
| Vendor | Product |
|---|---|
| sierrawireless | airlink es440 |
| sierrawireless | airlink es450 |
| sierrawireless | airlink gx400 |
| sierrawireless | airlink gx440 |
| sierrawireless | airlink gx450 |
| sierrawireless | airlink ls300 |
| sierrawireless | airlink lx40 |
| sierrawireless | airlink lx60 |
| sierrawireless | airlink mp70 |
| sierrawireless | airlink mp70e |
| sierrawireless | airlink rv50 |
| sierrawireless | airlink rv50x |
| sierrawireless | aleos |
References
- http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
- http://www.securityfocus.com/bid/108147
- https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
- http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
- http://www.securityfocus.com/bid/108147
- https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063
- https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/
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