01 Record

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

HighKEVPUBLISHEDCNA: talos

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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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

03 Exploitation and scoring

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2025-12-12. Federal remediation due 2026-01-02.

SSVC decision

ExploitationactiveCISA reports credible evidence of active exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

27.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 98.0% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2019-05-06 18:43Z7 YR AGO

Last updated

2026-05-22 13:18Z5 MO AGO

Reserved

2018-01-02

Assigning CNA

talos

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-434Unrestricted Upload of File with Dangerous TypeBase

Data version

5.2

Document digest

e151fdb33c68dba889d36b12e3a05c68d94b27b557346c42d1865bc1ea680e6f

05 Affected products

VendorProductVersionsPlatforms

n/aSierra WirelessSierra Wireless AirLink ES450 FW 4.9.3—

06 References

packetstormsecurity.comhttp://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.htmlx_refsource_MISC
ics-cert.us-cert.govhttps://ics-cert.us-cert.gov/advisories/ICSA-19-122-03x_refsource_MISC
www.securityfocus.com108147http://www.securityfocus.com/bid/108147vdb-entryx_refsource_BID
talosintelligence.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2018-0748x_refsource_MISC
www.forescout.comhttps://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/third-party-advisory
www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063government-resource