CVE-2026-18909

Local system crash via unchecked report count

Published Aug 6, 2026 · Updated Aug 6, 2026

Stack-based buffer overflow in ELAN Smart-Pad through ETD24.21.52.3 allows local users to crash Windows via Intel SMBus recovery. ETDSMBus.sys forwards an unchecked hardware report count to ETD.sys, which uses it as a loop counter to copy into a fixed stack buffer without validating the destination size. Standard user privileges and the Intel SMBus recovery path are required; successful exploitation triggers a kernel bugcheck and system crash without reported data disclosure or modification.

CVSS severity4.7
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in ELAN Smart-Pad through ETD24.21.52.3 allows local users to crash Windows via Intel SMBus recovery. ETDSMBus.sys forwards an unchecked hardware report count to ETD.sys, which uses it as a loop counter to copy into a fixed stack buffer without validating the destination size. Standard user privileges and the Intel SMBus recovery path are required; successful exploitation triggers a kernel bugcheck and system crash without reported data disclosure or modification.

The record

CVE
CVE-2026-18909
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
ELAN Microelectronics
Product
ELAN Smart-Pad
Classifications
CWE-121, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=ETD24.21.52.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ELAN Microelectronics · ELAN Smart-Padversion=0 <=ETD24.21.52.3

Published CVSS scores

4.7ELAN MicroelectronicsCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.6ELAN MicroelectronicsCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1529System Shutdown/Reboot

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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