CVE-2018-20404: ETK_E900.sys, a SmartETK driver for VIA Technologies EPIA-E900 system board, is vulnerable to denial of servic

This week

HIGH 7.5REMOTEMITIGATE

CVE-2018-20404 is a high-severity flaw (CVSS 7.5) affecting epia-e900 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ETK_E900.sys, a SmartETK driver for VIA Technologies EPIA-E900 system board, is vulnerable to denial of service attack via IOCTL 0x9C402048, which calls memmove and constantly fails on an arbitrary (uncontrollable) address, resulting in an eternal hang or a BSoD.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-12-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: viatech

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-12-26 21:29 UTCPublished CVE record published
2026-06-17 01:52 UTCUpdated Record last modified

viatech epia-e900 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-20404?

epia-e900 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-20404 being exploited?

CVE-2018-20404 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-20404 affect?

CVE-2018-20404 affects epia-e900 firmware. Severity is high (CVSS 7.5). ETK_E900.sys, a SmartETK driver for VIA Technologies EPIA-E900 system board, is vulnerable to denial of service attack via IOCTL 0x9C402048, which calls memmove and constantly fails on an arbitrary (uncontrollable) address, resulting in an

How urgent is CVE-2018-20404?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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