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: 28%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
28%
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 45× in last 7d / 213× 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 443 total refreshes for this CVE.

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