Processing specially crafted .pm3 files in Advantech WebAccess HMI Designer 2.1.7.32 and prior may cause the system to write outside the in…

published 2018-04-25 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20445

cvss: 7.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

Processing specially crafted .pm3 files in Advantech WebAccess HMI Designer 2.1.7.32 and prior may cause the system to write outside the intended buffer area and may allow remote code execution.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-114-03 updated 2018-04-24 cvss 6.3

Advantech WebAccess HMI Designer

Advantech WebAccess HMI Designer <= 2.1.7.32
affected: mitigation “NCCIC is working with Advantech to provide mitigation steps to resolve the issues that have been reported in Advantech’s WebAccess HMI Designer.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.02% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

ICS-CERT Advantech WebAccess HMI Designer

Classification

Weakness

CWE-787 Out-of-bounds Write

References

securityfocus.com /bid/103972
vdb-entry, third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-18-114-03
third-party-advisory, us-government-resource

Sources

CVE List CVE-2018-8837
NVD CVE-2018-8837

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary