# CVE-2018-4063

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.

- Page: https://www.vulneraibility.com/cve/CVE-2018-4063
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2025-12-12; CISA due date 2026-01-02
- EPSS: 27.26%
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-12-13)
- Weakness: CWE-434
- Published: 2019-05-06

## Affected versions

- Sierra Wireless: affected Sierra Wireless AirLink ES450 FW 4.9.3

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
- [other] https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
- [other] http://www.securityfocus.com/bid/108147
- [other] https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
- [advisory] https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.