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CVE-2018-4063

79
FAUCET Score

CVE-2018-4063 is a critical remote code execution vulnerability affecting Sierra Wireless AirLink ES450 FW 4.9.3, specifically within its upload.cgi functionality. An authenticated attacker can exploit this by uploading a specially crafted file, leading to the execution of arbitrary code on the webserver. With a CVSS score of 8.8 (HIGH) and a FAUCET Risk Score of 98/100, this vulnerability allows for full compromise of confidentiality, integrity, and availability. Notably, CISA has confirmed active exploitation of this flaw, despite a lack of public exploit code in Metasploit or ExploitDB, and it has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.4.9CPE matchmatch criteria
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*
< 4.11.0CPE matchmatch criteria
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*
< 4.9.4CPE matchmatch criteria
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
27.85%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Dec 12, 2025
This CVE's current EPSS score of 0.2785 is in the 97th percentile among its peer group of 17,822 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
forescout.com / blog/ot-network-security-threats-industrial-routers-under-attack
ExploitThird Party Advisory
packetstormsecurity.com / files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
ExploitVDB Entry
ics-cert.us-cert.gov / advisories/ICSA-19-122-03
Third Party AdvisoryUS Government Resource
talosintelligence.com / vulnerability_reports/TALOS-2018-0748
ExploitThird Party Advisory
securityfocus.com / bid/108147
Broken Link