CVE-2016-20046 zFTP Client 20061220+dfsg3-4.1 Local Buffer Overflow
Local attackers can exploit a buffer overflow in zFTP Client to crash the application or execute arbitrary code with user privileges.
- 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-2016-20046?
CVE-2016-20046 is a high-severity memory corruption vulnerability in zFTP Client, published on 28 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
zFTP Client 20061220+dfsg3-4.1 contains a buffer overflow vulnerability in the NAME parameter handling of FTP connections that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an oversized NAME value exceeding the 80-byte buffer allocated in strcpy_chk to overwrite the instruction pointer and execute shellcode with user privileges.
Weakness: CWE-787
Which versions are affected by CVE-2016-20046?
How do I fix CVE-2016-20046?
No fix has been published for CVE-2016-20046 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-2016-20046 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-20046 exists.
Sources
Also known as GHSA-7h35-2q92-xp4r.