CVE-2007-3993

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

Published: 2007-07-25 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-3993 is rated High Risk (67.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.83%). EPSS rose +1.02% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize 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-2007-3993

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 2026-06-15 0.81% 1.83% +1.02%
2 2025-03-30 1.36% 0.81% -0.56%
3 2025-03-29 — 1.36% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-3993

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C 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:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2007-3993

NVD evaluator notes for CVE-2007-3993

Comment: http://www.frsirt.com/english/advisories/2007/2637

Solution: Vendor has released an upgrade to fix vulnerability: http://www.kerio.com/kms_download.html

Affected software / configurations for CVE-2007-3993

Vendor Product Version Raw CPE
kerio kerio_mailserver <= 6.4.0 cpe:2.3:a:kerio:kerio_mailserver:*:*:*:*:*:*:*:*

References for CVE-2007-3993

cvelogic Threat Intelligence