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CVE-2018-8993: In Windows Master (aka Windows Optimization Master) 7.99.13.604, the driver file (WoptiHWDetect.SYS) allows lo

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This month
HIGH 7.8DOWNGRADE

CVE-2018-8993 is a high-severity flaw (CVSS 7.8) affecting windows optimization master. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Windows Master (aka Windows Optimization Master) 7.99.13.604, the driver file (WoptiHWDetect.SYS) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCtl 0xf1002001.

Why this priority

  • High severity
  • Public exploit reference

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

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.4% (top 66%)
CISA exploited listNo
WeaknessCWE-20
Published2018-03-25
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: windows optimization master project

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

Am I affected?

Timeline

windows optimization master project windows optimization master DOWNGRADE
Affected: 7.99.13.604
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.99.13.604
1. Check installed version
apt-cache policy windows-optimization-master || rpm -q windows-optimization-master || windows-optimization-master --version
2. No fixed release: DOWNGRADE to a release before 7.99.13.604 (Debian / Ubuntu)
apt-cache madison windows-optimization-master sudo apt install windows-optimization-master=<VERSION_BEFORE_7.99.13.604> sudo apt-mark hold windows-optimization-master
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list windows-optimization-master sudo dnf downgrade windows-optimization-master-<VERSION_BEFORE_7.99.13.604> sudo dnf versionlock add windows-optimization-master
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
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-2018-8993?

windows optimization master: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-8993 being exploited?

CVE-2018-8993 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-2018-8993 affect?

CVE-2018-8993 affects windows optimization master. Severity is high (CVSS 7.8). In Windows Master (aka Windows Optimization Master) 7.99.13.604, the driver file (WoptiHWDetect.SYS) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values fro

How urgent is CVE-2018-8993?

Priority 41/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

Related CVEs

References

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