Vulnerability record · CVE-2004-1109 · published 10 January 2005

CVE-2004-1109: Kerio personal firewall vulnerability

Kerio · Personal Firewall

The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to cause a denial of service (CPU consumption and system freeze from infinite loop) via a (1) TCP, (2) UDP, or (3) ICMP packet with a zero length IP Option field.

5.0 CVSS 2.0 Medium EPSS 3.2% · top 12.2%

5.0CVSS 2.0 base score

3.2%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

8References, 2 tagged exploit

16 Jun 2026Last modified by NVD

Description

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Personal Firewall Kerio

References

Link	Tags
http://www.eeye.com/html/research/advisories/AD20041109.html
http://www.kerio.com/security_advisory.html	Vendor Advisory
http://www.securityfocus.com/bid/11639	ExploitPatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/17992
http://www.eeye.com/html/research/advisories/AD20041109.html
http://www.kerio.com/security_advisory.html	Vendor Advisory
http://www.securityfocus.com/bid/11639	ExploitPatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/17992

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2004-1109), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.