SecOps SignalSecurity Intelligence Workspace
Loading collection status
Vulnerabilities/CVE-2018-4063Public Intelligence Dossier
Source: sierrawireless · Limited verification•Last verified: •Collection Degraded
CVE-2018-4063ListedHIGH (raw)CVSS 9.0CWE-434

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3

Published: 07 May 2019•Last updated: 17 Jun 2026, 07:28 AM IST•Source identifier: talos-cna@cisco.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added12 Dec 2025
Due02 Jan 2026
RansomwareUnknown
CVSS score
9.0HIGH (raw)
AV:N/AC:L/Au:S/C:C/I:C/A:C
Metric sourcenvd@nist.gov
EPSS probability
27.3%0.273
Percentile98th
Weakness type
CWE-434
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

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.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; SOC ecosystem technology relevance; HIGH severity; Known exploitation signal from CISA KEV or ransomware metadata; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • sierrawireless aleos · < 4.4.9; < 4.11.0; < 4.9.4 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:h:sierrawireless:airlink_es440:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_gx400:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_gx440:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_ls300:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_lx40:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_lx60:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_mp70:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_mp70e:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_rv50:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_rv50x:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched kev-network-exposure (CVSS AV:N, CISA KEV Listed); file-upload (CWE-434)

Exposure

  1. Identify assets with the exact CVE and confirm the affected product/version against the advisory.Telemetry: DeviceTvmSoftwareVulnerabilities · KEV listing raises urgency, but inventory is needed to establish local exposure. · Rule kev-network-exposure
  2. Identify the affected upload feature and deployed product version.Telemetry: Application inventory · The CWE does not identify a specific local upload path. · Rule file-upload

Exploitation evidence

  1. Review relevant edge or application access logs for unusual requests around the advisory window.Telemetry: CommonSecurityLog · Log review is a hunting hypothesis; KEV listing alone does not show local exploitation. · Rule kev-network-exposure
Show more (2)

Exploitation evidence

  1. Review uploads and subsequent access to newly created executable or script files.Telemetry: Application access logs · A suspicious upload followed by execution may warrant investigation. · Rule file-upload

Response

  1. Recheck the affected assets after the source-stated mitigation or update is applied.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies local remediation. · Rule kev-network-exposure

CISA KEV Record

Catalog entry
12 Dec 2025
Required action due
02 Jan 2026
Known ransomware use
Unknown

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Change History & Source Data

— No recorded material change

CNA / source
talos-cna@cisco.com
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_es440:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_gx400:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_gx440:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_ls300:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_lx40:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_lx60:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_mp70:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_mp70e:-:*:*:*:*:*:*:*, cpe:2.3:h:sierrawireless:airlink_rv50:-:*:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2025-12-12nvd.nist.govSource recordics-cert.us-cert.govSource recordtalosintelligence.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2018-4063
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2018-4063
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2018-4063"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Looking up related community queries…

Loading related intelligence

Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.