CVE-2025-34421
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 MEAISP.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 MEAISP.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 in the administrative executable, which attempts to load MEAISP.DLL from its installation directory without secure path validation or integrity checks. A local attacker with write access to the MailEnable installation directory can place a malicious MEAISP.DLL that will be loaded and executed 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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Determine MailEnable installed versionLocate the MailEnable installation directory and identify the version of the administrative components. This is typically found in product information, about dialogs, or version metadata within the installation folder.Affected if The installed version is any version prior to 10.54 (for example, 10.53, 10.50, earlier releases).
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Identify installation directory pathFind the root directory where MailEnable is installed. This is typically a folder such as C:\Program Files\MailEnable or C:\MailEnable, depending on installation choices.Affected if The directory path is writable by non-privileged users.
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Check filesystem permissions on installation directoryExamine access control lists (ACLs) on the MailEnable installation directory to determine which users or groups have write permissions. Use operating system tools to review security permissions.Affected if Users without administrator privileges have write access to the MailEnable installation directory.
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Locate MEAISP.DLL in installation directorySearch the MailEnable installation directory for the presence of MEAISP.DLL. Verify the file's digital signature and hash if possible to confirm it is the legitimate component.Affected if MEAISP.DLL exists in the installation directory and was not placed there by the installation process, or if the file signature cannot be verified.
You are affected if MailEnable version is below 10.54 AND non-privileged users have write access to the installation directory where MEAISP.DLL could be placed.
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. Additionally, verify filesystem permissions on the MailEnable installation directory to ensure only privileged administrators have write access, and scan for any existing malicious MEAISP.DLL files.
MailEnable 10.54
- Back up the current MailEnable installation and all configuration data
- Download MailEnable version 10.54 or later from the official vendor website (mailenable.com)
- Run the MailEnable installer and upgrade the existing installation to version 10.54 or newer
- After upgrading, verify the administrative interface (MEADMIN.exe) launches without errors
- Restrict write permissions on the MailEnable installation directory to prevent unauthorized DLL planting
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
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-34421 — 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-2025-34421 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