What is CVE-2019-20018?

CVE-2019-20018 is a medium-severity vulnerability in Matio Project, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2019-12-27.

How severe is CVE-2019-20018?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Out-of-bounds Read in Matio Project

CVE-2019-20018

A stack-based buffer over-read was discovered in ReadNextCell in mat5.c in matio 1.5.17.

Vulnerability class: Buffer Overflow

Published 2019-12-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Matio Project — versions 1.5.17

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/tbeu/matio/issues/129 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2019-20018?: CVE-2019-20018 is a medium-severity vulnerability in Matio Project, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2019-12-27.
How severe is CVE-2019-20018?: Medium severity. CVSS v3 base score is 6.5 out of 10.