CVE-2019-25466 Easy File Sharing Web Server 7.2 Local SEH Overflow
Local attackers can execute arbitrary code by crafting a malicious username, leading to potential privilege escalation on Easy File Sharing Web Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-25466?
CVE-2019-25466 is a high-severity memory corruption vulnerability in Sharing-File Easy File Sharing Web Server, published on 11 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Easy File Sharing Web Server 7.2 contains a local structured exception handling buffer overflow vulnerability that allows local attackers to execute arbitrary code by creating a malicious username. Attackers can craft a username with a payload containing 4059 bytes of padding followed by a nseh value and seh pointer to trigger the overflow when adding a new user account.
Weakness: CWE-787
Which versions are affected by CVE-2019-25466?
How do I fix CVE-2019-25466?
No fix has been published for CVE-2019-25466 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-2019-25466 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25466 exists.
Sources
Also known as GHSA-4c84-63pp-c7rv.