What is CVE-2019-10989?

CVE-2019-10989 is a critical-severity vulnerability in Advantech Webaccess, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-06-28.

How severe is CVE-2019-10989?

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

Buffer overflow in Advantech Webaccess

CVE-2019-10989

In WebAccess/SCADA Versions 8.3.5 and prior, multiple heap-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. Note: A different vulnerability than CVE-2019-10991.

Vulnerability class: Buffer Overflow

Published 2019-06-28 · 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: 0.086 (95.1th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.086 · newest: 0.086 · change: 0.000

Affected products

Advantech Webaccess
Webaccess Webaccess/scada — versions Versions 8.3.5 and prior

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.us-cert.gov/ics/advisories/icsa-19-178-05 (US Government Resource, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-590/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-591/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2019-10989?: CVE-2019-10989 is a critical-severity vulnerability in Advantech Webaccess, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-06-28.
How severe is CVE-2019-10989?: Critical severity. CVSS v3 base score is 9.8 out of 10.