How severe is CVE-2007-3993?

CVE-2007-3993 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2007-3993 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3993?

CVE-2007-3993 affects Kerio Kerio Mailserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-3993?

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-2007-3993 published?

CVE-2007-3993 was published on 2007-07-25 and last updated on 2026-06-16.

CVE-2007-3993

CVE-2007-3993 is a critical-severity vulnerability in Kerio Kerio Mailserver 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% (76th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kerio Kerio Mailserver
Published: 2007-07-25
Last modified: 2026-06-16

Description

Unspecified vulnerability in the attachment filter in Kerio MailServer before 6.4.1 has unknown impact and remote attack vectors.

Frequently asked questions

What is CVE-2007-3993?: Unspecified vulnerability in the attachment filter in Kerio MailServer before 6.4.1 has unknown impact and remote attack vectors.
How severe is CVE-2007-3993?: CVE-2007-3993 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-3993 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3993?: CVE-2007-3993 affects Kerio Kerio Mailserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-3993?: 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-2007-3993 published?: CVE-2007-3993 was published on 2007-07-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:kerio:kerio_mailserver:*:*:*:*:*:*:*:*

More vulnerabilities in Kerio Kerio Mailserver

CVE-2008-0860 — Critical (CVSS 10.0): Unspecified vulnerability in the AVG plugin in Kerio MailServer before 6.5.0 has unspecified impact via unknown remote…
CVE-2004-2441 — Critical (CVSS 10.0): Unspecified vulnerability in Kerio MailServer before 6.0.3 has unknown impact and unknown remote attack vectors,…
CVE-2006-1158 — High (CVSS 7.8): Kerio MailServer before 6.1.3 Patch 1 allows remote attackers to cause a denial of service (application crash) via a…
CVE-2008-0858 — High (CVSS 7.5): Buffer overflow in the Visnetic anti-virus plugin in Kerio MailServer before 6.5.0 might allow remote attackers to…
CVE-2005-1062 — High (CVSS 7.5): The administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and…
CVE-2003-0487 — High (CVSS 7.5): Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and…

All CVEs affecting Kerio Kerio Mailserver →