CVE-2018-4063

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-12-12), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 27%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
27%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

May 6, 2019

Last Modified

December 15, 2025

Advisory Details (4)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
generic

OT Network Security Threats: Industrial Routers Under Attack

https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063
generic🟡 PoC Available

TALOS-2018-0748 || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
generic
http://www.securityfocus.com/bid/108147

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 55× in last 7d / 234× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 859 total refreshes for this CVE.

  1. 2026-09-19 21:15 UTCGHSA enrichment
  2. 2026-09-19 17:04 UTCEG score recompute
  3. 2026-09-19 17:04 UTCGHSA enrichment
  4. 2026-09-19 15:36 UTCEPSS rescore
  5. 2026-09-19 12:51 UTCGHSA enrichment
  6. 2026-09-19 08:40 UTCGHSA enrichment
  7. 2026-09-19 04:26 UTCGHSA enrichment
  8. 2026-09-19 00:15 UTCGHSA enrichment
  9. 2026-09-18 20:04 UTCEG score recompute
  10. 2026-09-18 20:04 UTCGHSA enrichment
  11. 2026-09-18 19:22 UTCEPSS rescore
  12. 2026-09-18 19:20 UTCCISA KEV update
  13. 2026-09-18 15:52 UTCGHSA enrichment
  14. 2026-09-18 14:15 UTCCISA KEV update
  15. 2026-09-18 11:36 UTCGHSA enrichment
  16. 2026-09-18 07:25 UTCGHSA enrichment
  17. 2026-09-18 03:14 UTCGHSA enrichment
  18. 2026-09-17 23:03 UTCEG score recompute
  19. 2026-09-17 23:03 UTCGHSA enrichment
  20. 2026-09-17 19:22 UTCEPSS rescore
  21. 2026-09-17 18:51 UTCGHSA enrichment
  22. 2026-09-17 14:37 UTCGHSA enrichment
  23. 2026-09-17 10:26 UTCGHSA enrichment
  24. 2026-09-17 06:14 UTCGHSA enrichment
  25. 2026-09-17 02:03 UTCGHSA enrichment
Show 75 more
  1. 2026-09-16 21:52 UTCGHSA enrichment
  2. 2026-09-16 17:40 UTCEG score recompute
  3. 2026-09-16 17:40 UTCGHSA enrichment
  4. 2026-09-16 14:10 UTCCISA KEV update
  5. 2026-09-16 13:24 UTCGHSA enrichment
  6. 2026-09-16 09:12 UTCEG score recompute
  7. 2026-09-16 09:12 UTCGHSA enrichment
  8. 2026-09-16 05:01 UTCGHSA enrichment
  9. 2026-09-16 00:49 UTCGHSA enrichment
  10. 2026-09-15 20:37 UTCGHSA enrichment
  11. 2026-09-15 16:16 UTCGHSA enrichment
  12. 2026-09-15 12:05 UTCGHSA enrichment
  13. 2026-09-15 07:53 UTCGHSA enrichment
  14. 2026-09-15 03:42 UTCEG score recompute
  15. 2026-09-15 03:41 UTCGHSA enrichment
  16. 2026-09-15 03:05 UTCEPSS rescore
  17. 2026-09-15 03:05 UTCEPSS rescore
  18. 2026-09-14 23:30 UTCGHSA enrichment
  19. 2026-09-14 19:24 UTCCISA KEV update
  20. 2026-09-14 19:18 UTCGHSA enrichment
  21. 2026-09-14 15:07 UTCGHSA enrichment
  22. 2026-09-14 10:55 UTCGHSA enrichment
  23. 2026-09-14 06:44 UTCGHSA enrichment
  24. 2026-09-14 02:33 UTCGHSA enrichment
  25. 2026-09-13 22:21 UTCGHSA enrichment
  26. 2026-09-13 18:10 UTCGHSA enrichment
  27. 2026-09-13 13:59 UTCGHSA enrichment
  28. 2026-09-13 09:47 UTCGHSA enrichment
  29. 2026-09-13 05:36 UTCGHSA enrichment
  30. 2026-09-13 01:25 UTCGHSA enrichment
  31. 2026-09-12 21:14 UTCGHSA enrichment
  32. 2026-09-12 17:02 UTCEG score recompute
  33. 2026-09-12 17:02 UTCGHSA enrichment
  34. 2026-09-12 12:51 UTCGHSA enrichment
  35. 2026-09-12 08:40 UTCGHSA enrichment
  36. 2026-09-12 04:28 UTCGHSA enrichment
  37. 2026-09-12 00:16 UTCGHSA enrichment
  38. 2026-09-11 20:05 UTCGHSA enrichment
  39. 2026-09-11 18:49 UTCCISA KEV update
  40. 2026-09-11 15:53 UTCEG score recompute
  41. 2026-09-11 15:53 UTCGHSA enrichment
  42. 2026-09-11 14:48 UTCEPSS rescore
  43. 2026-09-11 11:42 UTCEG score recompute
  44. 2026-09-11 11:42 UTCGHSA enrichment
  45. 2026-09-11 09:32 UTCEPSS rescore
  46. 2026-09-11 07:31 UTCGHSA enrichment
  47. 2026-09-11 03:20 UTCGHSA enrichment
  48. 2026-09-10 23:09 UTCGHSA enrichment
  49. 2026-09-10 19:28 UTCCISA KEV update
  50. 2026-09-10 18:58 UTCGHSA enrichment
  51. 2026-09-10 14:47 UTCGHSA enrichment
  52. 2026-09-10 10:36 UTCEG score recompute
  53. 2026-09-10 10:35 UTCGHSA enrichment
  54. 2026-09-10 06:23 UTCGHSA enrichment
  55. 2026-09-10 02:12 UTCGHSA enrichment
  56. 2026-09-09 22:01 UTCGHSA enrichment
  57. 2026-09-09 19:08 UTCCISA KEV update
  58. 2026-09-09 17:50 UTCGHSA enrichment
  59. 2026-09-09 13:38 UTCGHSA enrichment
  60. 2026-09-09 09:27 UTCGHSA enrichment
  61. 2026-09-09 05:15 UTCGHSA enrichment
  62. 2026-09-09 01:04 UTCEG score recompute
  63. 2026-09-09 01:04 UTCGHSA enrichment
  64. 2026-09-08 20:51 UTCGHSA enrichment
  65. 2026-09-08 18:54 UTCCISA KEV update
  66. 2026-09-08 16:39 UTCGHSA enrichment
  67. 2026-09-08 12:23 UTCGHSA enrichment
  68. 2026-09-08 08:10 UTCGHSA enrichment
  69. 2026-09-08 03:58 UTCGHSA enrichment
  70. 2026-09-07 23:46 UTCGHSA enrichment
  71. 2026-09-07 19:35 UTCGHSA enrichment
  72. 2026-09-07 15:24 UTCGHSA enrichment
  73. 2026-09-07 11:12 UTCGHSA enrichment
  74. 2026-09-07 06:56 UTCGHSA enrichment
  75. 2026-09-07 02:42 UTCGHSA enrichment

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Frequently asked(6)

What is CVE-2018-4063?
CVE-2018-4063 is a critical vulnerability published on May 6, 2019. 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…
When was CVE-2018-4063 disclosed?
CVE-2018-4063 was first published in the National Vulnerability Database on May 6, 2019, with the most recent update on December 15, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-4063 actively exploited?
Yes. CISA added CVE-2018-4063 to the Known Exploited Vulnerabilities catalog on December 12, 2025, affecting Sierra Wireless AirLink ALEOS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-4063?
CVE-2018-4063 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-4063?
CVE-2018-4063 affects Sierra Wireless AirLink ALEOS. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2018-4063?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-4063, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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