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Vulnerability record · CVE-2006-5420 · published 20 October 2006

CVE-2006-5420: Kerio winroute firewall vulnerability

Kerio · Winroute Firewall

Kerio WinRoute Firewall 6.2.2 and earlier allows remote attackers to cause a denial of service (crash) via malformed DNS responses.

5.0 CVSS 2.0 Medium EPSS 2.6% · top 15.5%
5.0CVSS 2.0 base score
2.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

Kerio WinRoute Firewall 6.2.2 and earlier allows remote attackers to cause a denial of service (crash) via malformed DNS responses.

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.

References

LinkTags
http://secunia.com/advisories/22986
http://securitytracker.com/id?1017067
http://www.kerio.com/kwf_history.html
http://www.securityfocus.com/bid/20584
http://www.vupen.com/english/advisories/2006/4056
https://exchange.xforce.ibmcloud.com/vulnerabilities/29629
http://secunia.com/advisories/22986
http://securitytracker.com/id?1017067
http://www.kerio.com/kwf_history.html
http://www.securityfocus.com/bid/20584
http://www.vupen.com/english/advisories/2006/4056
https://exchange.xforce.ibmcloud.com/vulnerabilities/29629

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Related vulnerabilities

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

7.8CVE-2005-4425Kerio winroute firewall vulnerabilityUnspecified vulnerability in Kerio WinRoute Firewall before 6.1.3 allows remote attackers to cause a denial of service (crash) via certain RTSP strea…EPSS 1.8%7.5CVE-2005-1062Kerio mailserver vulnerabilityThe administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and MailServer up to 6.0.8 allows remote…EPSS 2.6%6.4CVE-2004-2483Kerio winroute firewall vulnerabilityKerio WinRoute Firewall before 6.0.9 uses information from PTR queries in response to A queries, which allows remote attackers to poison the DNS cach…EPSS 1.7%5.0CVE-2006-2267Kerio winroute firewall vulnerabilityKerio WinRoute Firewall before 6.2.1 allows remote attackers to cause a denial of service (application crash) via unknown vectors in the "email proto…EPSS 3.2%5.0CVE-2006-0335Kerio winroute firewall vulnerabilityMultiple unspecified vulnerabilities in Kerio WinRoute Firewall before 6.1.4 Patch 1 allow remote attackers to cause a denial of service via multiple…EPSS 2.7%5.0CVE-2006-0336Kerio winroute firewall vulnerabilityKerio WinRoute Firewall before 6.1.4 Patch 2 allows attackers to cause a denial of service (CPU consumption and hang) via unknown vectors involving "…EPSS 2.0%5.0CVE-2005-1063Kerio mailserver vulnerabilityThe administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and MailServer up to 6.0.8 allows remote…EPSS 1.6%2.1CVE-2007-6385Kerio winroute firewall improper authentication vulnerabilityThe proxy server in Kerio WinRoute Firewall before 6.4.1 does not properly enforce authentication for HTTPS pages, which has unknown impact and attac…EPSS 0.37%

Source: NIST National Vulnerability Database (record CVE-2006-5420), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.