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.

Published: 2006-10-20 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-5420 is rated Moderate Risk (49/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.92%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-5420

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-13 1.85% 1.92% +0.07%
2 2025-06-16 1.18% 1.85% +0.67%
3 2025-03-30 — 1.18% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-5420

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2006-5420

OS Trackers for CVE-2006-5420

vendor priority summary link
alpine — CVE-2006-5420: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-5420

NVD evaluator notes for CVE-2006-5420

Solution: Upgrade to 6.2.3

Affected software / configurations for CVE-2006-5420

Vendor Product Version Raw CPE
kerio winroute_firewall <= 6.2.2 cpe:2.3:a:kerio:winroute_firewall:*:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.1 cpe:2.3:a:kerio:winroute_firewall:5.0.1:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.2 cpe:2.3:a:kerio:winroute_firewall:5.0.2:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.3 cpe:2.3:a:kerio:winroute_firewall:5.0.3:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.4 cpe:2.3:a:kerio:winroute_firewall:5.0.4:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.5 cpe:2.3:a:kerio:winroute_firewall:5.0.5:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.6 cpe:2.3:a:kerio:winroute_firewall:5.0.6:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.7 cpe:2.3:a:kerio:winroute_firewall:5.0.7:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.8 cpe:2.3:a:kerio:winroute_firewall:5.0.8:*:*:*:*:*:*:*
kerio winroute_firewall 5.0.9 cpe:2.3:a:kerio:winroute_firewall:5.0.9:*:*:*:*:*:*:*
kerio winroute_firewall 5.1 cpe:2.3:a:kerio:winroute_firewall:5.1:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.1 cpe:2.3:a:kerio:winroute_firewall:5.1.1:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.2 cpe:2.3:a:kerio:winroute_firewall:5.1.2:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.3 cpe:2.3:a:kerio:winroute_firewall:5.1.3:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.4 cpe:2.3:a:kerio:winroute_firewall:5.1.4:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.5 cpe:2.3:a:kerio:winroute_firewall:5.1.5:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.6 cpe:2.3:a:kerio:winroute_firewall:5.1.6:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.7 cpe:2.3:a:kerio:winroute_firewall:5.1.7:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.8 cpe:2.3:a:kerio:winroute_firewall:5.1.8:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.9 cpe:2.3:a:kerio:winroute_firewall:5.1.9:*:*:*:*:*:*:*
kerio winroute_firewall 5.1.10 cpe:2.3:a:kerio:winroute_firewall:5.1.10:*:*:*:*:*:*:*
kerio winroute_firewall 5.10 cpe:2.3:a:kerio:winroute_firewall:5.10:*:*:*:*:*:*:*
kerio winroute_firewall 6.0 cpe:2.3:a:kerio:winroute_firewall:6.0:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.1 cpe:2.3:a:kerio:winroute_firewall:6.0.1:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.2 cpe:2.3:a:kerio:winroute_firewall:6.0.2:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.3 cpe:2.3:a:kerio:winroute_firewall:6.0.3:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.4 cpe:2.3:a:kerio:winroute_firewall:6.0.4:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.5 cpe:2.3:a:kerio:winroute_firewall:6.0.5:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.6 cpe:2.3:a:kerio:winroute_firewall:6.0.6:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.7 cpe:2.3:a:kerio:winroute_firewall:6.0.7:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.8 cpe:2.3:a:kerio:winroute_firewall:6.0.8:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.9 cpe:2.3:a:kerio:winroute_firewall:6.0.9:*:*:*:*:*:*:*
kerio winroute_firewall 6.0.11 cpe:2.3:a:kerio:winroute_firewall:6.0.11:*:*:*:*:*:*:*
kerio winroute_firewall 6.1 cpe:2.3:a:kerio:winroute_firewall:6.1:*:*:*:*:*:*:*
kerio winroute_firewall 6.1.1 cpe:2.3:a:kerio:winroute_firewall:6.1.1:*:*:*:*:*:*:*
kerio winroute_firewall 6.1.2 cpe:2.3:a:kerio:winroute_firewall:6.1.2:*:*:*:*:*:*:*
kerio winroute_firewall 6.1.3 cpe:2.3:a:kerio:winroute_firewall:6.1.3:*:*:*:*:*:*:*
kerio winroute_firewall 6.1.4 cpe:2.3:a:kerio:winroute_firewall:6.1.4:*:*:*:*:*:*:*
kerio winroute_firewall 6.1.4_patch_1 cpe:2.3:a:kerio:winroute_firewall:6.1.4_patch_1:*:*:*:*:*:*:*
kerio winroute_firewall 6.1.4_patch_2 cpe:2.3:a:kerio:winroute_firewall:6.1.4_patch_2:*:*:*:*:*:*:*
kerio winroute_firewall 6.2 cpe:2.3:a:kerio:winroute_firewall:6.2:*:*:*:*:*:*:*
kerio winroute_firewall 6.2.1 cpe:2.3:a:kerio:winroute_firewall:6.2.1:*:*:*:*:*:*:*

References for CVE-2006-5420

cvelogic Threat Intelligence