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.

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

EPSS: 0.001 (4.4th percentile) — read the EPSS interpretation.

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.

Affected products

Mamedev Mess Emulator — versions 0.154-3.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (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.