What is CVE-2015-6839?

CVE-2015-6839 is a medium-severity vulnerability in Grupo Msa Vot.ar, classified under Improper Input Validation. CVSS score: 4.6/10. Published 2017-10-23.

How severe is CVE-2015-6839?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Improper input validation in Grupo Msa Vot.ar

CVE-2015-6839

The parse function in MSA vot.Ar 3.1 does not check whether a candidate receives more than one vote, which allows physically proximate attackers to cast multiple votes for a candidate via a crafted RFID ballot tag.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-10-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Grupo Msa Vot.ar — versions 3.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

docs.google.com/document/d/1aH6kvoLR8O1qWOpEz89FAB2xFcBNB-QqHgZpXxg0vGE/preview (Third Party Advisory, Issue Tracking)
docs.google.com/document/d/13t1jqu-Upj4SyjYBMj3OMshdy6rGBrnb1R3P-goz-cs/edit (Third Party Advisory, Issue Tracking)
www.eleccionesciudad.gob.ar/uploads/resoluciones/Informe_05-BALOTAJE-2015-07-17… (Third Party Advisory, Issue Tracking)
www.youtube.com/watch (Third Party Advisory)

Frequently asked questions

What is CVE-2015-6839?: CVE-2015-6839 is a medium-severity vulnerability in Grupo Msa Vot.ar, classified under Improper Input Validation. CVSS score: 4.6/10. Published 2017-10-23.
How severe is CVE-2015-6839?: Medium severity. CVSS v3 base score is 4.6 out of 10.