What is CVE-2020-12019?

CVE-2020-12019 is a critical-severity vulnerability in Advantech Webaccess, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2020-06-15.

How severe is CVE-2020-12019?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Advantech Webaccess

CVE-2020-12019

WebAccess Node Version 8.4.4 and prior is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2020-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.022 (82.1th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Advantech Webaccess
Webaccess Node — versions Version 8.4.4 and prior

Weakness classification (CWE)

References

www.us-cert.gov/ics/advisories/icsa-20-161-01 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2020-12019?: CVE-2020-12019 is a critical-severity vulnerability in Advantech Webaccess, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2020-06-15.
How severe is CVE-2020-12019?: Critical severity. CVSS v3 base score is 9.8 out of 10.