# Sierra Wireless AirLink ALEOS: AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability · pwn.watch

> 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. Added to CISA KEV on 2025-12-12.

Page: https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063 · generated 2026-10-22T22:00:08.805Z

## Status
- Severity: high · status: closed · patch: patched
- Product: Sierra Wireless AirLink ALEOS
- Started: 2025-12-12 · closed: 2025-12-12
- CVEs: CVE-2018-4063
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063/feed.xml
- JSON Feed: https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063.json
- This file: https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063/llms.txt

## Updates (newest first)
- 2025-12-12: CISA added CVE-2018-4063 to the KEV catalog (due 2026-01-02).

## Fix brief
# Security brief: Sierra Wireless AirLink ALEOS: AirLink ALEOS Unrestricted Upload of File with Dangerous Type Vulnerability

Source: https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063 · status: closed (closed Dec 12, 2025) · severity: high · updated Dec 12, 2025

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
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. Added to CISA KEV on 2025-12-12.

Severity detail: CVSS 8.8 (CISA ADP, v3.1); actively exploited (CISA KEV)

- Product: Sierra Wireless AirLink ALEOS
- CVE / advisory ids: CVE-2018-4063

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Dec 12, 2025: CISA added CVE-2018-4063 to the KEV catalog (due 2026-01-02).

## Advisories
- [CISA guidance: Sierra Wireless AirLink ALEOS](https://www.cisa.gov/news-events/ics-advisories/icsa-19-122-03) (CISA)
- [Sierra Wireless advisory: Sierra Wireless AirLink ALEOS](https://source.sierrawireless.com/resources/airlink/software_reference_docs/technical-bulletin/sierra-wireless-technical-bulletin---swi-psa-2019-003) (Sierra Wireless)
- [Sierra Wireless advisory: Sierra Wireless AirLink ALEOS](https://source.sierrawireless.com/resources/airlink/hardware_reference_docs/airlink_es450_eol) (Sierra Wireless)
- [NVD: CVE-2018-4063](https://nvd.nist.gov/vuln/detail/CVE-2018-4063) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025). KEV says affected products could be end-of-life, so some devices may never get a fix.

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Machine-readable: https://pwn.watch/i/sierra-wireless-airlink-aleos-cve-2018-4063.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.