CVE-2006-5420

CVE-2006-5420 is a medium-severity vulnerability in Kerio Winroute Firewall with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

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

Frequently asked questions

What is CVE-2006-5420?
Kerio WinRoute Firewall 6.2.2 and earlier allows remote attackers to cause a denial of service (crash) via malformed DNS responses.
How severe is CVE-2006-5420?
CVE-2006-5420 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-5420 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-5420?
CVE-2006-5420 primarily affects Kerio Winroute Firewall. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-5420?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-5420 published?
CVE-2006-5420 was published on 2006-10-20 and last updated on 2026-06-16.

References

Affected products (42)

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