CVE-2025-34421 HIGH

CVE-2025-34421: MailEnable < 10.54 DLL Hijacking via Unsafe Loading of MEAISP.DLL

Vendor Mailenable
Product MailEnable
Weakness CWE-427
Published December 10, 2025
Last update May 14, 2026

CVSS base score

8.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

MailEnable 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.

Key dates

02Disclosure timeline

December 10, 2025 CVE published
May 14, 2026 Record updated