CVE-2019-25660 LanHelper 1.74 Denial of Service via Buffer Overflow
Attackers can crash the LanHelper application by sending excessively long input strings to the Message field, causing a denial of service.
- 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-2019-25660?
CVE-2019-25660 is a medium-severity memory corruption vulnerability in Hainsoft LanHelper, published on 5 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
LanHelper 1.74 contains a local buffer overflow vulnerability that allows attackers to crash the application by sending excessively long input strings. Attackers can exploit the Form Send Message feature by pasting 6000 bytes of data into the Message text field to trigger a denial of service condition.
Weakness: CWE-787
Which versions are affected by CVE-2019-25660?
It affects 1 product.
Products include Hainsoft Lanhelper.
How do I fix CVE-2019-25660?
No fix has been published for CVE-2019-25660 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-2019-25660 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25660 exists.
Sources
Also known as GHSA-fxf6-j3c6-2ghw.