CVE-2018-4063
Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability
- High 8.8
- Exploited: added to CISA KEV 12 Dec 2025
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.
Key facts
- Published
- 6 May 2019
- Last changed
- 22 May 2026
- Assigned by
- talos
- KEV added
- 12 Dec 2025
- KEV fix due
- 2 Jan 2026
- EPSS
- 27.26% likely to be exploited in the next 30 days, higher than 98.088% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Sierra Wireless |
|
Timeline
- 6 May 2019 Published
- 12 Dec 2025 Added to the CISA KEV catalogue