CVE-2016-20039
CVE-2016-20039 is a high-severity vulnerability with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- CVSS v4: 8.6
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2016-10833
- Weakness: CWE-787
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2016-20039?
- CVE-2016-20039 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2016-20039 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2016-20039?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2016-20039 have an EU (EUVD) identifier?
- Yes. CVE-2016-20039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-10833.
- When was CVE-2016-20039 published?
- CVE-2016-20039 was published on 2026-03-28 and last updated on 2026-06-17.
References
- http://mamedev.org/
- https://www.exploit-db.com/exploits/39673
- https://www.vulncheck.com/advisories/multi-emulator-super-system-buffer-overflow
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