CVE-2020-36964 YATinyWinFTP - Denial of Service
Attackers can crash the YATinyWinFTP service by sending a malformed 272-byte buffer, causing a denial of service.
- 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-2020-36964?
CVE-2020-36964 is a high-severity denial of service vulnerability in ik80 YATinyWinFTP, published on 28 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
YATinyWinFTP contains a denial of service vulnerability that allows attackers to crash the FTP service by sending a 272-byte buffer with a trailing space. Attackers can exploit the service by connecting and sending a malformed command that triggers a buffer overflow and service crash.
Weakness: CWE-787
Which versions are affected by CVE-2020-36964?
How do I fix CVE-2020-36964?
No fix has been published for CVE-2020-36964 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-36964 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36964 exists.
Sources
Also known as GHSA-237r-v2jq-99fc.