What is CVE-2018-4063?

CVE-2018-4063 is a vulnerability in Sierra Wireless. Published 2019-05-06.

Is CVE-2018-4063 known to be exploited?

Yes. CVE-2018-4063 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-12), indicating it is being actively exploited.

Vulnerability in Sierra Wireless

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 routa…

EPSS: 0.019 (83.5th percentile) — read the EPSS interpretation.

Affected products

N/a Sierra Wireless — versions Sierra Wireless AirLink ES450 FW 4.9.3

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-12-12. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2026-01-02.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-u… (x_refsource_MISC)
ics-cert.us-cert.gov/advisories/ICSA-19-122-03 (x_refsource_MISC)
108147 (vdb-entry, x_refsource_BID)
talosintelligence.com/vulnerability_reports/TALOS-2018-0748 (x_refsource_MISC)

Frequently asked questions

What is CVE-2018-4063?: CVE-2018-4063 is a vulnerability in Sierra Wireless. Published 2019-05-06.
Is CVE-2018-4063 known to be exploited?: Yes. CVE-2018-4063 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-12), indicating it is being actively exploited.