CVSS v3
8.8
HIGH
EPSS Score
0.8%
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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.
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.
Yes. CVE-2018-4063 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 1/2/2026.
CVE-2018-4063 has a CVSS v3 base score of 8.8 (HIGH severity).
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Ranked by exploit probability (EPSS).