CVE-2026-18909

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreHIGH 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%CVSS: 4.7Exploit: None knownExposed: 0

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

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
4.7(high)
EG Risk
21(Track)
EG Risk 21/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 6, 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 / 30× 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.

  1. 2026-08-21 04:52 UTCGHSA enrichment
  2. 2026-08-20 03:56 UTCGHSA enrichment
  3. 2026-08-19 02:59 UTCGHSA enrichment
  4. 2026-08-18 01:51 UTCEG score recompute
  5. 2026-08-18 01:50 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 00:55 UTCEG score recompute
  8. 2026-08-17 00:55 UTCGHSA enrichment
  9. 2026-08-16 02:14 UTCEPSS rescore
  10. 2026-08-15 23:59 UTCGHSA enrichment
  11. 2026-08-14 23:02 UTCGHSA enrichment
  12. 2026-08-13 22:07 UTCGHSA enrichment
  13. 2026-08-12 21:10 UTCGHSA enrichment
  14. 2026-08-11 20:09 UTCEG score recompute
  15. 2026-08-11 20:09 UTCGHSA enrichment
  16. 2026-08-11 13:42 UTCEPSS rescore
  17. 2026-08-10 19:13 UTCGHSA enrichment
  18. 2026-08-09 18:16 UTCGHSA enrichment
  19. 2026-08-08 17:21 UTCEG score recompute
  20. 2026-08-08 17:21 UTCGHSA enrichment
  21. 2026-08-08 16:37 UTCEPSS rescore
  22. 2026-08-07 16:25 UTCGHSA enrichment
  23. 2026-08-06 15:29 UTCEG score recompute
  24. 2026-08-06 15:29 UTCGHSA enrichment
  25. 2026-08-06 14:45 UTCEG score recompute
Show 5 more
  1. 2026-08-06 14:45 UTCGHSA enrichment
  2. 2026-08-06 13:46 UTCEPSS rescore
  3. 2026-08-06 05:25 UTCEG score recompute
  4. 2026-08-06 04:25 UTCEG score recompute
  5. 2026-08-06 04:25 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database on August 6, 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% probability of exploitation in the next 30 days, which ranks it in the top 99.7% of all scored CVEs.
What is the CVSS score of CVE-2026-18909?
CVE-2026-18909 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-18909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18909, 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.

Dependency Blast Radius

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