How severe is CVE-2007-4646?

CVE-2007-4646 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2007-4646 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4646?

CVE-2007-4646 affects Hexamail Hexamail Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-4646?

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-2007-4646 published?

CVE-2007-4646 was published on 2007-08-31 and last updated on 2026-06-16.

CVE-2007-4646

CVE-2007-4646 is a critical-severity vulnerability in Hexamail Hexamail Server with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 16% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Hexamail Hexamail Server
Published: 2007-08-31
Last modified: 2026-06-16

Description

Buffer overflow in the pop3 service in Hexamail Server 3.0.0.001 Lite allows remote attackers to cause a denial of service (daemon crash) and probably execute arbitrary code via a long USER command.

Frequently asked questions

What is CVE-2007-4646?: Buffer overflow in the pop3 service in Hexamail Server 3.0.0.001 Lite allows remote attackers to cause a denial of service (daemon crash) and probably execute arbitrary code via a long USER command.
How severe is CVE-2007-4646?: CVE-2007-4646 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-4646 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4646?: CVE-2007-4646 affects Hexamail Hexamail Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-4646?: 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-2007-4646 published?: CVE-2007-4646 was published on 2007-08-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:hexamail:hexamail_server:3.0.0.001_lite:*:*:*:*:*:*:*

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