CVE-1999-0846
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedDenial of service in MDaemon 2.7 via a large number of connection attempts.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · low confidenceDenial of service vulnerability in MDaemon mail server version 2.7, exploitable through a large number of connection attempts that likely exhaust server resources or cause the service to become unresponsive.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2.8.5= 2.8.6CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed MDaemon versionCheck the MDaemon version by opening the program, viewing Help > About, or locating the version in the service properties. The executable file properties may also display version information.Affected if The installed version is 2.7, 2.8.5, or 2.8.6 as listed in the affected versions.
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Verify MDaemon service is runningCheck if the MDaemon mail service is active and listening on network ports (typically ports 25, 110, 143, 443). Use command 'netstat -an | findstr LISTENING' or check Services.msc for MDaemon service status.Affected if The MDaemon service is running and accepting network connections on SMTP, POP3, or IMAP ports.
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Review connection handling configurationExamine the MDaemon configuration files in the MDaemon installation directory, particularly the primary configuration file (often named MDaemon.ini or similar). Look for connection-related settings.Affected if The server is configured with default connection settings without explicit rate limiting or connection throttling enabled.
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Check network exposureDetermine if the MDaemon server is directly accessible from untrusted networks. Review firewall rules and network perimeter configurations that allow external access to mail ports.Affected if The server is reachable from external networks without network-level protections such as connection rate limiting or firewall throttling.
You are affected if MDaemon version 2.7, 2.8.5, or 2.8.6 is installed and the mail service is running with default connection settings exposed to the network.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade MDaemon to a patched version beyond 2.7, and implement network-level protections such as rate limiting, connection throttling, or firewall rules to mitigate excessive connection attempts.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-1999-0846 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-1999-0846 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data