Buffer overflow in Mamedev Mess Emulator
CVE-2016-20039
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (3.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Mamedev Mess Emulator — versions 0.154-3.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/39673 (exploit)
- mamedev.org/ (product)
- www.vulncheck.com/advisories/multi-emulator-super-system-buffer-overflow (third-party-advisory)
Frequently asked questions
- What is CVE-2016-20039?
- CVE-2016-20039 is a high-severity vulnerability in Mamedev Mess Emulator, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-03-28.
- How severe is CVE-2016-20039?
- High severity. CVSS v3 base score is 8.4 out of 10.