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CVE-2018-4063: Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability

criticalknown exploitedCVE-2018-4063
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Sierra Wireless AirLink ALEOS contains an unrestricted upload of file with dangerous type vulnerability. 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. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

CSIRTS triage

vendor: Sierra Wirelessproduct: AirLink ALEOSOther
What
This vulnerability allows for the unrestricted upload of dangerous file types.
Who is affected
Users of Sierra Wireless AirLink ALEOS.
Urgency
Remediation is urgent due to the critical nature of the vulnerability and confirmed exploitation.
Action
Discontinue product utilization and follow Sierra Wireless's guidance.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-12-12
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2018-4063

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2018-4063coverage & exploitation statusNVD · CVE.org

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