What is CVE-2021-42205?

CVE-2021-42205 is a medium-severity vulnerability in Lenovo Elan Miniport Touchpad Driver, classified under CWE-703. CVSS score: 4.7/10. Published 2022-11-07.

How severe is CVE-2021-42205?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Is CVE-2021-42205 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Lenovo Elan Miniport Touchpad Driver

CVE-2021-42205

ELAN Miniport touchpad Windows driver before 24.21.51.2, as used in PC hardware from multiple manufacturers, allows local users to cause a system crash by sending a certain IOCTL request, because that request is handled twice.

Published 2022-11-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (15.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Lenovo Elan Miniport Touchpad Driver

Weakness classification (CWE)

CWE-703

Public proof-of-concept exploits

References

www.emc.com.tw/upload/F2E/Vulnerability Report/Vulnerability Report_Miniport to… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-42205?: CVE-2021-42205 is a medium-severity vulnerability in Lenovo Elan Miniport Touchpad Driver, classified under CWE-703. CVSS score: 4.7/10. Published 2022-11-07.
How severe is CVE-2021-42205?: Medium severity. CVSS v3 base score is 4.7 out of 10.
Is CVE-2021-42205 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.