{"id":"CVE-2018-4063","published":"2019-05-06T19:29:00Z","modified":"2026-06-17T01:58:18Z","title":"Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability","vendor":"Sierra Wireless","product":"AirLink ALEOS","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an unrestricted upload of a file with a dangerous type in the upload.cgi functionality of Sierra Wireless AirLink ALEOS, as affecting the AirLink ES450 device. A crafted HTTP request can upload executable code to the webserver where it becomes routable, allowing remote code execution, and an attacker needs to be able to send an authenticated HTTP request to the device to trigger it.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:10:35Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.2726,"percentile":0.98051,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2025-12-12","dueDate":"2026-01-02","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"https://www.cisa.gov/news-events/ics-advisories/icsa-19-122-03 ; https://source.sierrawireless.com/resources/airlink/software_reference_docs/technical-bulletin/sierra-wireless-technical-bulletin---swi-psa-2019-003 ; https://source.sierrawireless.com/resources/airlink/hardware_reference_docs/airlink_es450_eol ; https://nvd.nist.gov/vuln/detail/CVE-2018-4063","provenance":"source"},"vulncheckKev":{"dateAdded":"2025-12-11","exploitedFirstSeen":"2025-12-11","ransomware":false,"evidence":[{"url":"https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/","date":"2025-12-11"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2025-12-12"},{"url":"https://www.recordedfuture.com/blog/december-2025-cve-landscape","date":"2026-01-13"},{"url":"https://www.loginsoft.com/reports/annually/vulnerability-intelligence-report-2025","date":"2026-01-20"},{"url":"https://www.forescout.com/resources/2025-threat-roundup/","date":"2026-01-29"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"references":[{"url":"http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html","tags":["Exploit","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/108147","tags":["Broken Link"]},{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748","tags":["Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html","tags":["Exploit","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/108147","tags":["Broken Link"]},{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063","tags":["US Government Resource"]},{"url":"https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/","tags":["Exploit","Third Party Advisory"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Exploited via crafted HTTP request to public web interface","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"A specially crafted HTTP request can upload a file","start":133,"end":183}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1505.003","name":"Web Shell","tactics":["persistence"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Uploaded executable web content placed on server","mappingType":"primary_impact","evidence":[{"from":"description","quote":"resulting in executable code being uploaded, and routable, to the webserver","start":185,"end":260}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2018-15849","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-15849","exploited":true,"exploitedSince":"2025-12-12","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":["http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html","https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748","https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1505.003"],"provenance":"ai"}],"timeline":[{"date":"2019-05-06","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-4063","provenance":"source"},{"date":"2025-12-11","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/","provenance":"source"},{"date":"2025-12-12","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2025-12-12","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-15849","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":2412},"priority":{"score":73.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":5.0,"detail":"added 322 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.61,"detail":"percentile 0.9805"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"3 NVD 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