CVE-2016-20039 — Multi Emulator Super System 0.154-3.1 Buffer Overflow

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HIGH

Multi Emulator Super System 0.154-3.1 Buffer Overflow

Published Mar 28, 2026

8.6

HIGH

CVSS 4.0

EPSS 0.15%

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.

Affected products

Vendor Mamedev Product Mess Emulator Default
n/a
- Version
  0.154-3.1
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mamedev

Mess Emulator

n/a

Version	Status	Constraints
0.154-3.1	affected	-

Remediation

No remediation recorded yet.

Metrics

0.15% 0.00147

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00147

Score over time

Mar–Oct 2026

EPSS v4
EPSS v5

Percentile over time

EPSS v4
EPSS v5

Table of values (3 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.15% (0.00147)	3.29th	v5 (v2026.06.15)
Jun 15, 2026	0.15% (0.00147)	4.23th	v5 (v2026.06.15)
Mar 28, 2026	0.01% (0.00013)	2.15th	v4 (v2025.03.14)

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (3)

http://mamedev.org/
product
https://www.exploit-db.com/exploits/39673
exploit
https://www.vulncheck.com/advisories/multi-emulator-super-system-buffer-overflow
third-party-advisory

Link	Providers	Tags
http://mamedev.org/		product
https://www.exploit-db.com/exploits/39673		exploit
https://www.vulncheck.com/advisories/multi-emulator-super-system-buffer-overflow		third-party-advisory