CVE-2016-20039 Multi Emulator Super System 0.154-3.1 Buffer Overflow
Local attackers can execute arbitrary code or crash the application by supplying an oversized gamma parameter value.
- 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-2016-20039?
CVE-2016-20039 is a high-severity memory corruption vulnerability in mamedev Mess Emulator, 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
Multi Emulator Super System 0.154-3.1 contains a buffer overflow vulnerability in the gamma parameter handling that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an oversized gamma parameter value to overflow the stack buffer and overwrite the instruction pointer with a controlled address to achieve code execution.
Weakness: CWE-787
Which versions are affected by CVE-2016-20039?
How do I fix CVE-2016-20039?
No fix has been published for CVE-2016-20039 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-2016-20039 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-20039 exists.
Sources
Also known as GHSA-8vxc-wffq-wgmw.