CVE-2025-34096 Easy File Sharing HTTP Server 7.2 Buffer Overflow via POST to /sendemail.ghp
Unauthenticated remote attackers can execute arbitrary code via a stack-based buffer overflow in the sendemail endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34096?
CVE-2025-34096 is a critical memory corruption vulnerability in EFS Software Inc. Easy File Sharing HTTP Server, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A stack-based buffer overflow vulnerability exists in Easy File Sharing HTTP Server version 7.2. The flaw is triggered when a crafted POST request is sent to the /sendemail.ghp endpoint containing an overly long Email parameter. The application fails to properly validate the length of this field, resulting in a memory corruption condition. An unauthenticated remote attacker can exploit this to execute arbitrary code with the privileges of the server process.
Weakness: CWE-119
Which versions are affected by CVE-2025-34096?
How do I fix CVE-2025-34096?
No fix has been published for CVE-2025-34096 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-34096 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34096 exists.
Public exploit code: 1 Metasploit module and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-j62r-9gm4-h7vx.