CVE-2025-34423
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 · uneditedMailEnable versions prior to 10.54 contain an unsafe DLL loading vulnerability that can lead to local arbitrary code execution. The MailEnable administrative executable attempts to load MEAIAU.DLL from its installation directory without sufficient integrity validation or a secure search order. A local attacker with write access to that directory can plant a malicious MEAIAU.DLL, which is then loaded on execution, resulting in attacker-controlled code running with the privileges of the process.
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 · high confidenceMailEnable versions prior to 10.54 contain an unsafe DLL loading vulnerability where the administrative executable loads MEAIAU.DLL from its installation directory without secure DLL search order or integrity validation. A local attacker with write access to the installation directory can plant a malicious DLL that executes with the privileges of the administrative process.
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< 10.54CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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Check MailEnable versionLocate the MailEnable installation directory and find the version information, typically in the program properties, an about dialog, or a version.txt file within the installation folder. Compare this version number to 10.54.Affected if The installed version is below 10.54 (for example, 10.53, 10.50, or earlier)
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Verify MEAIAU.DLL presenceLocate the file named MEAIAU.DLL within the MailEnable installation directory. This is the DLL that gets loaded without secure search order.Affected if The file MEAIAU.DLL exists in the MailEnable installation directory
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Inspect installation directory permissionsCheck the file system permissions on the MailEnable installation directory. Use the operating system's security properties or the icacls command to view which users and groups have write access.Affected if Users other than administrators or the system account have write permissions to the installation directory
You are affected if MailEnable version is below 10.54 AND the installation directory is writable by non-admin users, allowing a local attacker to replace MEAIAU.DLL with a malicious DLL.
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.
dbcve · scoped10.54
Upgrade to MailEnable version 10.54 or later, and restrict write permissions on the MailEnable installation directory to prevent unprivileged users from planting malicious DLLs.
10.54
- 1. Back up the current MailEnable installation, configuration data, and any custom settings before proceeding with the upgrade.
- 2. Download MailEnable version 10.54 or later from the official MailEnable website (www.mailenable.com).
- 3. Stop all MailEnable services to ensure a clean upgrade process.
- 4. Run the MailEnable installer with administrative privileges.
- 5. Follow the on-screen prompts to complete the upgrade, ensuring the option to update existing configuration is selected.
- 6. Restart MailEnable services after the upgrade completes.
- 7. Verify the installation by checking that the administrative tool launches without errors and that the MEAIAU.DLL is loaded from the correct system location.
- 8. Validate that the version shows 10.54 or later using the MailEnable administrative console or version check utility.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-34423 — 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-2025-34423 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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- 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