CVE-2018-4063
Sierrawireless Aleos ≤ 4.4.9
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2018-4063 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Sierrawireless Aleos. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 2% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
The vulnerability is an unrestricted file upload flaw, tracked as CVE-2018-4063 and assigned CWE-434, that affects the upload.cgi component of Sierra Wireless AirLink ES450 firmware version 4.9.3. A specially crafted HTTP request can cause executable code to be written to a location that is both routable and directly executable by the embedded web server, resulting in remote code execution.
An attacker who can supply valid credentials may send an authenticated HTTP request to the device and thereby upload and execute arbitrary code. The flaw carries a CVSS 3.1 score of 8.8, reflecting network attack vector, low complexity, and the ability to impact confidentiality, integrity, and availability without user interaction.
Public advisories and proof-of-concept material have been published by Talos (TALOS-2018-0748) and ICS-CERT (ICSA-19-122-03), along with exploit code on Packet Storm. No additional mitigation details are provided in the available references.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2018-15849
Vulnerability Data
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…
more
can make an authenticated HTTP request to trigger this vulnerability.
- CWE(s)
- KEV Date Added
- 12 December 2025
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
—
—
—
V5.1.1
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Hardened configuration baselines can enforce allowed file types and processing rules.
Restricting execution of unauthorized software directly blocks dangerous uploaded files from running.
Secure development practices include input validation and file-type restrictions that prevent this weakness.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.