Skip to main content
ExploitedIn CISA KEVFix available

CVE-2018-4063

Exploitation confirmed. First attested on 2025-12-12 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2019-05-06
  • Fixed in4.11.0 · 4.9.4 · 4.4.9
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2019-05-0619:29CVE publishedNVD
  2. 2025-12-12Added to the CISA KEV catalogCISA KEV
  3. 2025-12-12Listed as exploited by GCVEGCVE
  4. 2025-12-12Exploitation first reportedCISA KEV
  5. 2025-12-1304:55SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-4063?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-4063?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Sierrawireless aleosversion to verify
BranchAffectedFixed in
4.11< 4.11.04.11.0
4.9< 4.9.44.9.4
4.4< 4.4.94.4.9

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As talos, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Sierra Wireless
    Affected
    • = Sierra Wireless AirLink ES450 FW 4.9.3no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2019-05-07

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-19-122-03 CISA3 known affected

    Sierra Wireless AirLink ALEOS (Update B)

    MP70 MP70E RV50 RV50X LX40 and LX60: All versions prior to 4.12 · LS300 GX400 GX440 and ES440: All versions prior to 4.4.9 · GX450 and ES450: All versions prior to 4.9.4

Full record on NVD

Fix

  1. Update Sierrawireless aleos to 4.11.0 · 4.9.4 · 4.4.9
  2. CISA’s 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.due 2026-01-02
  3. Mitigation from the vendor CISA ICSA-19-122-03 · 3 productsSierra Wireless recommends users upgrade to the latest version of ALEOS for the products and versions below. For upgrade assistance, contact an authorized AirLink reseller, Sierra Wireless sales, technical representative, or Sierra Wireless technical support.
  4. Mitigation from the vendor CISA ICSA-19-122-03 · 3 productsLS300, GX400, GX440, ES440: ALEOS 4.4.9 The ALEOS 4.4.9 Release Note is available (login required)
  5. Mitigation from the vendor CISA ICSA-19-122-03 · 3 productsGX450, ES450: ALEOS 4.9.4.p09
  6. Mitigation from the vendor CISA ICSA-19-122-03 · 3 productsMP70, MP70E, RV50, RV50X, LX40, LX60: ALEOS 4.12 The ALEOS 4.12.0 Release Note is available (login required)
  7. Mitigation from the vendor CISA ICSA-19-122-03 · 3 productsEnsure a strong password is set for the user account. For guidance on password strength, Sierra Wireless recommends the “memorized secret authenticator” guidelines in NIST SP800-63B.
  8. Mitigation from the vendor CISA ICSA-19-122-03 · 3 productsIf ALEOS Application Framework (AAF) is enabled, ensure a strong password is set for the AAF User account.

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2025-12-12
Patch Due Date
2026-01-02
Ransomware Use
Unknown
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.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2019-05-06
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-96pr-35f4-cf4c

Frequently asked questions

What is CVE-2018-4063?

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.

Is CVE-2018-4063 actively exploited?

Yes. CVE-2018-4063 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-01-02.

What is the CVSS score for CVE-2018-4063?

CVE-2018-4063 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, December 2025Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record