How severe is CVE-2007-3803?

CVE-2007-3803 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2007-3803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3803?

CVE-2007-3803 affects Clavister Clavister Coreplus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-3803?

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

When was CVE-2007-3803 published?

CVE-2007-3803 was published on 2007-07-16 and last updated on 2026-06-16.

CVE-2007-3803

CVE-2007-3803 is a critical-severity vulnerability in Clavister Clavister Coreplus with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Clavister Clavister Coreplus
Published: 2007-07-16
Last modified: 2026-06-16

Description

The SMTP ALG in Clavister CorePlus before 8.80.04, and 8.81.00, does not properly parse SMTP commands in certain circumstances, which allows remote attackers to bypass address blacklists.

Frequently asked questions

What is CVE-2007-3803?: The SMTP ALG in Clavister CorePlus before 8.80.04, and 8.81.00, does not properly parse SMTP commands in certain circumstances, which allows remote attackers to bypass address blacklists.
How severe is CVE-2007-3803?: CVE-2007-3803 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-3803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3803?: CVE-2007-3803 affects Clavister Clavister Coreplus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-3803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2007-3803 published?: CVE-2007-3803 was published on 2007-07-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:clavister:clavister_coreplus:*:*:*:*:*:*:*:*

More vulnerabilities in Clavister Clavister Coreplus

CVE-2007-3805 — Medium (CVSS 5.4): The IKE implementation in Clavister CorePlus before 8.80.03, and 8.80.00, does not properly validate certificates…
CVE-2007-3804 — Medium (CVSS 5.0): The AntiVirus engine in the HTTP-ALG in Clavister CorePlus before 8.81.00 and 8.80.03 might allow remote attackers to…

All CVEs affecting Clavister Clavister Coreplus →