How severe is CVE-2006-6554?

CVE-2006-6554 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-6554 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6554?

CVE-2006-6554 primarily affects Kerio Kerio Mailserver. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-6554?

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

When was CVE-2006-6554 published?

CVE-2006-6554 was published on 2006-12-14 and last updated on 2026-06-16.

CVE-2006-6554

CVE-2006-6554 is a medium-severity vulnerability in Kerio Kerio Mailserver 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

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kerio Kerio Mailserver
Published: 2006-12-14
Last modified: 2026-06-16

Description

Unspecified vulnerability in Kerio MailServer before 6.3.1 allows remote attackers to cause a denial of service (segmentation fault and service stop) via certain long LDAP queries, as demonstrated by vd_kms6.pm.

Frequently asked questions

What is CVE-2006-6554?: Unspecified vulnerability in Kerio MailServer before 6.3.1 allows remote attackers to cause a denial of service (segmentation fault and service stop) via certain long LDAP queries, as demonstrated by vd_kms6.pm.
How severe is CVE-2006-6554?: CVE-2006-6554 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-6554 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6554?: CVE-2006-6554 primarily affects Kerio Kerio Mailserver. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-6554?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-6554 published?: CVE-2006-6554 was published on 2006-12-14 and last updated on 2026-06-16.

References

Affected products (29)

cpe:2.3:a:kerio:kerio_mailserver:*:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.0:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.1:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.1.1:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.6.3:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.6.4:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.6.5:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.0:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.1:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.2:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.3:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.4:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.5:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.6:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.7:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.8:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.9:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:5.7.10:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.1:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.3:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.4:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.5:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.6:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.7:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.0.8:*:*:*:*:*:*:*
cpe:2.3:a:kerio:kerio_mailserver:6.1.3_patch_1:*:*:*:*:*:*:*

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