How severe is CVE-2006-3787?

CVE-2006-3787 has a CVSS 2.0 base score of 2.1, rated low severity.

Is CVE-2006-3787 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3787?

CVE-2006-3787 affects Kerio Personal Firewall. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-3787?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-3787 published?

CVE-2006-3787 was published on 2006-07-24 and last updated on 2026-06-16.

CVE-2006-3787

CVE-2006-3787 is a low-severity vulnerability in Kerio Personal Firewall with a CVSS 2.0 base score of 2.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 2.1)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kerio Personal Firewall
Published: 2006-07-24
Last modified: 2026-06-16

Description

kpf4ss.exe in Sunbelt Kerio Personal Firewall 4.3.x before 4.3.268 does not properly hook the CreateRemoteThread API function, which allows local users to cause a denial of service (crash) and bypass protection mechanisms by calling CreateRemoteThread.

Frequently asked questions

What is CVE-2006-3787?: kpf4ss.exe in Sunbelt Kerio Personal Firewall 4.3.x before 4.3.268 does not properly hook the CreateRemoteThread API function, which allows local users to cause a denial of service (crash) and bypass protection mechanisms by calling CreateRemoteThread.
How severe is CVE-2006-3787?: CVE-2006-3787 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2006-3787 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3787?: CVE-2006-3787 affects Kerio Personal Firewall. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-3787?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-3787 published?: CVE-2006-3787 was published on 2006-07-24 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:kerio:personal_firewall:*:*:*:*:*:*:*:*

More vulnerabilities in Kerio Personal Firewall

CVE-2005-1062 — High (CVSS 7.5): The administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and…
CVE-2003-1491 — High (CVSS 7.5): Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows…
CVE-2004-2329 — High (CVSS 7.2): Kerio Personal Firewall (KPF) 2.1.5 allows local users to execute arbitrary code with SYSTEM privileges via the Load…
CVE-2006-5153 — Medium (CVSS 5.0): The (1) fwdrv.sys and (2) khips.sys drivers in Sunbelt Kerio Personal Firewall 4.3.268 and earlier do not validate…
CVE-2005-1063 — Medium (CVSS 5.0): The administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and…
CVE-2004-1109 — Medium (CVSS 5.0): The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to cause a denial of service…

All CVEs affecting Kerio Personal Firewall →