What is CVE-2019-13556?

CVE-2019-13556 is a high-severity vulnerability in Advantech Webaccess, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2019-09-18.

How severe is CVE-2019-13556?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Advantech Webaccess

CVE-2019-13556

In WebAccess versions 8.4.1 and prior, multiple stack-based buffer overflow vulnerabilities are caused by a lack of proper validation of the length of user-supplied data. Exploitation of these vulnerabilities may allow remote code execution.

Vulnerability class: Buffer Overflow

Published 2019-09-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (81.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Advantech Webaccess
Webaccess — versions versions 8.4.1 and prior

Weakness classification (CWE)

References

www.us-cert.gov/ics/advisories/icsa-19-260-01 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2019-13556?: CVE-2019-13556 is a high-severity vulnerability in Advantech Webaccess, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2019-09-18.
How severe is CVE-2019-13556?: High severity. CVSS v3 base score is 8.8 out of 10.