PatchSiren

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
CRITICAL 9.1
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.

Sources and references

Verified primary and authoritative sources

  • CVE-2018-4063 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2018-4063

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2018-4063 NVD vulnerability detail

    Publisher, destination, and source semantics verified

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

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.