How severe is CVE-2006-3277?

CVE-2006-3277 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-3277 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3277?

CVE-2006-3277 primarily affects Mailenable Mailenable Enterprise. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3277?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-3277 published?

CVE-2006-3277 was published on 2006-06-28 and last updated on 2026-06-16.

CVE-2006-3277

CVE-2006-3277 is a medium-severity vulnerability in Mailenable Mailenable Enterprise with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Mailenable Mailenable Enterprise
Published: 2006-06-28
Last modified: 2026-06-16

Description

The SMTP service of MailEnable Standard 1.92 and earlier, Professional 2.0 and earlier, and Enterprise 2.0 and earlier before the MESMTPC hotfix, allows remote attackers to cause a denial of service (application crash) via a HELO command with a null byte in the argument, possibly triggering a length inconsistency or a missing argument.

Frequently asked questions

What is CVE-2006-3277?: The SMTP service of MailEnable Standard 1.92 and earlier, Professional 2.0 and earlier, and Enterprise 2.0 and earlier before the MESMTPC hotfix, allows remote attackers to cause a denial of service (application crash) via a HELO command with a null byte in the argument, possibly triggering a length inconsistency or a missing argument.
How severe is CVE-2006-3277?: CVE-2006-3277 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-3277 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3277?: CVE-2006-3277 primarily affects Mailenable Mailenable Enterprise. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-3277 published?: CVE-2006-3277 was published on 2006-06-28 and last updated on 2026-06-16.

References

Affected products (66)

cpe:2.3:a:mailenable:mailenable_enterprise:*:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.004:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.005:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.006:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.007:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.008:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.009:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.010:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.011:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.012:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.013:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.014:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.015:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.016:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.0.017:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.1:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.2:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.2a:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.5:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.6:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.7:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.8:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.9:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.12:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.13:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.14:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.15:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.16:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.17:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.18:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.19:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.51:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.52:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.53:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.54:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.71:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.72:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.73:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.91:*:*:*:*:*:*:*
cpe:2.3:a:mailenable:mailenable_professional:1.92:*:*:*:*:*:*:*

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