How severe is CVE-2006-6551?

CVE-2006-6551 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2006-6551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6551?

CVE-2006-6551 affects Tucows Client Code Suite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-6551?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2006-6551 published?

CVE-2006-6551 was published on 2006-12-14 and last updated on 2026-06-16.

CVE-2006-6551

CVE-2006-6551 is a high-severity vulnerability in Tucows Client Code Suite with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Tucows Client Code Suite
Published: 2006-12-14
Last modified: 2026-06-16

Description

PHP remote file inclusion vulnerability in libs/tucows/api/cartridges/crt_TUCOWS_domains/lib/domainutils.inc.php in Tucows Client Code Suite (CCS) 1.2.1015 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the _ENV[TCA_HOME] parameter.

Frequently asked questions

What is CVE-2006-6551?: PHP remote file inclusion vulnerability in libs/tucows/api/cartridges/crt_TUCOWS_domains/lib/domainutils.inc.php in Tucows Client Code Suite (CCS) 1.2.1015 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the _ENV[TCA_HOME] parameter.
How severe is CVE-2006-6551?: CVE-2006-6551 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-6551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6551?: CVE-2006-6551 affects Tucows Client Code Suite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-6551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-6551 published?: CVE-2006-6551 was published on 2006-12-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:tucows:client_code_suite:1.2.1015:*:*:*:*:*:*:*