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CVE-2016-20039

27
FAUCET Score

CVE-2016-20039 identifies a buffer overflow vulnerability in Multi Emulator Super System (MESS) versions 0.154-3.1, specifically within its gamma parameter handling. This flaw allows a local attacker to provide an oversized gamma value, leading to a stack buffer overflow that can crash the application or enable arbitrary code execution. With a CVSS v3.1 score of 8.4 (High), the potential impact includes high confidentiality, integrity, and availability compromise. Despite the high severity, there is no evidence of active exploitation, public exploit code availability (e.g., Metasploit, ExploitDB), or significant community discussion, and its EPSS score indicates a very low probability of exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
MamedevMess Emulator
0.154-3.1CNA affected

CVSS Data

CVSS version used by this source: 4.0

8.6HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.15%
Probability of exploitation in next 30 days
EPSS Percentile
4.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0015 is in the 7th percentile among its peer group of 3,241 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mamedev.org
exploit-db.com / exploits/39673
vulncheck.com / advisories/multi-emulator-super-system-buffer-overflow