CVE-2018-6633: In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.sys) allows local users to

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HIGH 7.8DOWNGRADE

CVE-2018-6633 is a high-severity flaw (CVSS 7.8) affecting proactive defense. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.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 0x80000038.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-02-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: micropoint

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

Am I affected?

Timeline

2018-02-05 18:29 UTCPublished CVE record published
2026-06-17 02:02 UTCUpdated Record last modified

micropoint proactive defense DOWNGRADE

Affected: 2.0.20266.0146

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.20266.0146

1. Check installed version

apt-cache policy proactive-defense || rpm -q proactive-defense || proactive-defense --version

2. No fixed release: DOWNGRADE to a release before 2.0.20266.0146 (Debian / Ubuntu)

apt-cache madison proactive-defense sudo apt install proactive-defense=<VERSION_BEFORE_2.0.20266.0146> sudo apt-mark hold proactive-defense

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list proactive-defense sudo dnf downgrade proactive-defense-<VERSION_BEFORE_2.0.20266.0146> sudo dnf versionlock add proactive-defense

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-2018-6633?

proactive defense: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-6633 being exploited?

CVE-2018-6633 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-2018-6633 affect?

CVE-2018-6633 affects proactive defense. Severity is high (CVSS 7.8). In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.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 0x800

How urgent is CVE-2018-6633?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2018-6632 HIGH 7.8 DOWNGRADE In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.sys) allows local users to
CVE-2018-6631 HIGH 7.8 DOWNGRADE In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110009.sys) allows local users to
CVE-2018-6630 HIGH 7.8 DOWNGRADE In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.sys) allows local users to
CVE-2018-6629 HIGH 7.8 DOWNGRADE In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.sys) allows local users to
CVE-2018-6628 HIGH 7.8 DOWNGRADE In Micropoint proactive defense software 2.0.20266.0146, the driver file (mp110005.sys) allows local users to

References

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