CVE-2020-37155 Core FTP Lite 1.3 - Denial of Service (PoC)
Attackers can crash Core FTP Lite by sending oversized input to the username field, causing a buffer overflow and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-37155?
CVE-2020-37155 is a medium-severity memory corruption vulnerability in Core FTP Lite, published on 6 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.
Weakness: CWE-120
Which versions are affected by CVE-2020-37155?
How do I fix CVE-2020-37155?
No fix has been published for CVE-2020-37155 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-2020-37155 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37155 exists.
Sources
Also known as GHSA-39mx-hmw6-9hmp.