CVE-2025-34421 MailEnable < 10.54 DLL Hijacking via Unsafe Loading of MEAISP.DLL
Local attackers can execute arbitrary code by planting a malicious DLL in the MailEnable installation directory, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34421?
CVE-2025-34421 is a high-severity vulnerability in Mailenable Mailenable, published on 10 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-427
Which versions are affected by CVE-2025-34421?
It affects 1 product.
Products include Mailenable Mailenable.
How do I fix CVE-2025-34421?
No fix has been published for CVE-2025-34421 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-34421 being exploited?
There is no known exploitation of CVE-2025-34421 in the wild and no public exploit code.
Other vulnerabilities in Mailenable Mailenable
- CVE-2015-9280 XML external entity in n/a
- CVE-2025-44148 Cross-site scripting in n/a
- CVE-2019-12924 XML external entity in n/a
- CVE-2015-9278 MailEnable before 8.60 allows Privilege Escalation because admin accounts could be created as a consequence of %0A mishandling in AUTH.TAB a
- CVE-2015-9277 Path traversal in n/a
Sources
Also known as GHSA-g4vc-m5pm-qwxv.