Risk Letters

Exploited vulnerability

CVE-2018-4063

TLP:CLEAR

Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability

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.

Facts

  • Vendor: Sierra Wireless
  • Product: AirLink ALEOS
  • CVSS: 8.8
  • EPSS (probability of exploitation within 30 days): 27.3 %
  • On CISA's Known Exploited Vulnerabilities list since: 12 December 2025
  • First known exploitation: 12 December 2025
  • CISA's deadline for US federal agencies: 2 January 2026
  • Weakness: CWE-434
  • First seen by Risk Letters: 12 December 2025

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD