CVE-2018-4063
Confirmed PUBLISHEDAn exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially...
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- May 06, 2019
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 8.8 High
- EPSS
- 28.1%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| n/a |
Sierra Wireless
|
Sierra Wireless AirLink ES450 FW 4.9.3 |
Affected |
CVE References
- 108147 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/108147
- packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-A... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-E...
- ics-cert.us-cert.gov/advisories/ICSA-19-122-03 ics-cert.us-cert.gov · CVE Record https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
- talosintelligence.com/vulnerability_reports/TALOS-2018-0748 talosintelligence.com · CVE Record https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:46 UTC |
| CISA | 2026-06-02 14:04 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:S/C:C/I:C/A:C
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:46:08 UTC · CVE
Weaknesses (CWE)
-
Unrestricted Upload of File with Dangerous Type
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:04 UTC about 2 months ago14:04 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:46 UTC about 2 months ago10:46 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
18:43 UTC about 7 years ago18:43 UTC · about 7 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC over 8 years ago00:00 UTC · over 8 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2018-4063
{
"cve_id": "CVE-2018-4063",
"title": "An exploitable remote code execution vulnerability exists in the upload.cgi f...",
"affected_vendor": "Sierra Wireless",
"affected_product": "Sierra Wireless",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.8,
"epss_score": 0.28056,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}