CVE-2026-18909

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory published 2026-08-06. A secondary CVSS source baseline 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 4.7Exploit: None knownExposed services: Not assessed

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

A stack-based buffer overflow vulnerability exists in ELAN Microelectronics Corp. ELAN Smart-Pad on Windows (ETD.sys and ETDSMBus.sys). During Intel SMBus recovery, ETDSMBus.sys does not enforce an upper-bound check on the hardware-derived report count, allowing an out-of-range value to be forwarded to ETD.sys where it is used as a loop counter for a stack buffer copy without destination size validation. A local attacker with standard user privileges can trigger a kernel bugcheck (BSOD 0xF7 DRIVER_OVERRAN_STACK_BUFFER), resulting in denial of service. This issue affects ELAN Smart-Pad through ETD24.21.52.3.

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100CISA SSVC

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
Severity47% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 6, 2026

Last Modified

September 3, 2026

References (1)

Vendor Advisories for CVE-2026-18909(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 53× 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 106 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-18909?
CVE-2026-18909 is a medium vulnerability published on August 6, 2026. A stack-based buffer overflow vulnerability exists in ELAN Microelectronics Corp. ELAN Smart-Pad on Windows (ETD.sys and ETDSMBus.sys). During Intel SMBus recovery, ETDSMBus.sys does not enforce an upper-bound check on the hardware-derived report count, allowing an out-of-range value to be…
When was CVE-2026-18909 disclosed?
CVE-2026-18909 was first published on August 6, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18909 actively exploited?
CVE-2026-18909 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18909?
CVE-2026-18909 has a CVSS base score of 4.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18909?
No fix for CVE-2026-18909 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-18909 are linked in the Vendor Advisories panel on this page.

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