PatchSiren cyber security CVE debrief
CVE-2018-4063 Sierra Wireless CVE debrief
CVE-2018-4063 is a Sierra Wireless AirLink ALEOS file-upload control weakness described as an unrestricted upload of a dangerous file type. CISA has added it to the Known Exploited Vulnerabilities catalog, so defenders should treat affected deployments as a remediation priority. The supplied record does not include a CVSS score or exploitation details, so urgency should be driven by the KEV listing and vendor guidance.
- Vendor
- Sierra Wireless
- Product
- AirLink ALEOS
- CVSS
- Unknown
- CISA KEV
- Listed
- Original CVE published
- 2025-12-12
- Original CVE updated
- 2025-12-12
- Advisory published
- 2025-12-12
- Advisory updated
- 2025-12-12
Who should care
Teams that operate or support Sierra Wireless AirLink ALEOS devices, especially security, network, and field-operations staff responsible for remote access appliances and any environment that must meet CISA KEV remediation deadlines.
Technical summary
The issue is a file-upload validation weakness: if ALEOS accepts dangerous file types without adequate restriction, an attacker may be able to place malicious content where the device processes it. CISA's KEV entry indicates the vulnerability is considered exploited in the wild, but the supplied sources do not provide exploitation mechanics, affected versions, or severity scoring.
Defensive priority
High / urgent. The CISA KEV listing and remediation due date of 2026-01-02 mean affected systems should be identified and addressed promptly.
Recommended defensive actions
- Confirm whether any deployed Sierra Wireless AirLink ALEOS devices match the affected scope described in the CVE record and vendor bulletin.
- Apply the vendor mitigation guidance referenced by CISA, including the Sierra Wireless technical bulletin SWI-PSA-2019-003 and the linked CISA advisory.
- Track remediation against the CISA KEV due date of 2026-01-02.
- If mitigations are unavailable or the product cannot be supported, discontinue use and plan replacement, consistent with CISA guidance.
- Review any related Sierra Wireless end-of-life notices cited by CISA and verify support status for your specific model or deployment.
Evidence notes
The supplied corpus is limited to official records: CISA KEV, CVE.org, NVD, and KEV metadata that references CISA ICS Advisory 19-122-03, Sierra Wireless technical bulletin SWI-PSA-2019-003, and a Sierra Wireless end-of-life notice. The record identifies CISA dateAdded 2025-12-12 and dueDate 2026-01-02. No CVSS score is included in the supplied data.
Official resources
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CVE-2018-4063 CVE record
CVE.org
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CVE-2018-4063 NVD detail
NVD
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CISA Known Exploited Vulnerabilities catalog
CISA - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Source item URL
cisa_kev
Prepared from the supplied official vulnerability and KEV records only. No exploit code, reproduction steps, or unsupported impact claims are included.