CVE-2005-3286: The FWDRV driver in Kerio Personal Firewall 4.2 and Server Firewall 1.1.1 allows local users to cause a denial

Routine

LOW 2.1DOWNGRADEDOWNGRADE

CVE-2005-3286 is a low-severity flaw (CVSS 2.1) affecting personal firewall, serverfirewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The FWDRV driver in Kerio Personal Firewall 4.2 and Server Firewall 1.1.1 allows local users to cause a denial of service (crash) by setting the PAGE_NOACCESS or PAGE_GUARD protection on the Page Environment Block (PEB), which triggers an exception, aka the "PEB lockout vulnerability."

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Published	2005-10-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kerio

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-10-23 10:02 UTCPublished CVE record published
2026-06-16 22:16 UTCUpdated Record last modified

kerio personal firewall DOWNGRADE

Affected: 4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2

1. Check installed version

apt-cache policy personal-firewall || rpm -q personal-firewall || personal-firewall --version

2. No fixed release: DOWNGRADE to a release before 4.2 (Debian / Ubuntu)

apt-cache madison personal-firewall sudo apt install personal-firewall=<VERSION_BEFORE_4.2> sudo apt-mark hold personal-firewall

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

dnf --showduplicates list personal-firewall sudo dnf downgrade personal-firewall-<VERSION_BEFORE_4.2> sudo dnf versionlock add personal-firewall

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.

kerio serverfirewall DOWNGRADE

Affected: 1.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.1

1. Check installed version

apt-cache policy serverfirewall || rpm -q serverfirewall || serverfirewall --version

2. No fixed release: DOWNGRADE to a release before 1.1.1 (Debian / Ubuntu)

apt-cache madison serverfirewall sudo apt install serverfirewall=<VERSION_BEFORE_1.1.1> sudo apt-mark hold serverfirewall

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

dnf --showduplicates list serverfirewall sudo dnf downgrade serverfirewall-<VERSION_BEFORE_1.1.1> sudo dnf versionlock add serverfirewall

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-2005-3286?

personal firewall: downgrade or apply the listed mitigation; serverfirewall: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-3286 being exploited?

CVE-2005-3286 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-2005-3286 affect?

CVE-2005-3286 affects personal firewall, serverfirewall. Severity is low (CVSS 2.1). The FWDRV driver in Kerio Personal Firewall 4.2 and Server Firewall 1.1.1 allows local users to cause a denial of service (crash) by setting the PAGE_NOACCESS or PAGE_GUARD protection on the Page Environment Block (PEB), which triggers an e

How urgent is CVE-2005-3286?

Priority 15/100. No elevated risk signals yet.

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References

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