What is CVE-2019-10993?

CVE-2019-10993 is a critical-severity vulnerability in Advantech Webaccess, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-06-28.

How severe is CVE-2019-10993?

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

Buffer overflow in Advantech Webaccess

CVE-2019-10993

In WebAccess/SCADA Versions 8.3.5 and prior, multiple untrusted pointer dereference vulnerabilities may allow a remote attacker to execute arbitrary code.

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: 0.107 (95.8th percentile), scored 2026-10-23.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.107 · newest: 0.107 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.us-cert.gov/ics/advisories/icsa-19-178-05 (US Government Resource, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-617/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-612/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-602/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-606/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-603/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-605/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-623/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-597/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-19-618/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2019-10993?: CVE-2019-10993 is a critical-severity vulnerability in Advantech Webaccess, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-06-28.
How severe is CVE-2019-10993?: Critical severity. CVSS v3 base score is 9.8 out of 10.