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…
- 5.0MediumCVSS base score
- 6.1%Exploitation in 30 daysEPSS · top 6.5% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it.
Show the exploits1
Exploit-DB1 entry
- MailEnable 1.x - SMTP 'HELO' Remote Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 28103dos, windowspublished 24 Jun 2006Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 6.1% · top 6.5% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
10
- http://www.mailenable.com/hotfix/mesmtpc.zip (opens in a new tab)x_refsource_CONFIRMx_transferred
- mailenable-smtp-helo-dos(27387) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 1016376 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- ADV-2006-2520 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20790 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 26791 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- http://www.divisionbyzero.be/?p=174 (opens in a new tab)x_refsource_MISCx_transferred
- 18630 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.divisionbyzero.be/?p=173 (opens in a new tab)x_refsource_MISCx_transferred
- 20060624 Mailenable SMTP Service DoS (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-3274 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2006-3277)Record last updated .