CVE-2006-3277
The SMTP service of MailEnable Standard 1.92 and earlier, Professional 2.0 and earlier, and...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2006-3277- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2006-3277- Updated
- 2026-11-02
EUVDEUVD-2006-3274 No score
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.
- Record
EUVD-2006-3274- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r589-x22v-575x No score
The SMTP service of MailEnable Standard 1.92 and earlier, Professional 2.0 and earlier, and...
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.
- Record
GHSA-r589-x22v-575x- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | MailEnable 1.x - SMTP 'HELO' Remote Denial of Service | 2006-06-24 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2006-3277 is a medium vulnerability (CVSS 5.0) in Mailenable Enterprise, published June 28, 2006. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 6.11%, the 93rd percentile. No source names a fixed version.