In WECON Technology Co., Ltd.

published 2018-10-08 8y ago modified 2026-06-17 4mo ago also EUVD-2018-9630

cvss: 5.3; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

In WECON Technology Co., Ltd. PI Studio HMI versions 4.1.9 and prior and PI Studio versions 4.2.34 and prior when parsing project files, the XMLParser that ships with Wecon PIStudio is vulnerable to a XML external entity injection attack, which may allow sensitive information disclosure.

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Vendor advisories

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

cisa ICSA-18-277-01 updated 2021-11-02 cvss 5.5

WECON PI Studio (Update A)

WECON PI Studio <= 4.2.125 WECON PI Studio HMI <= 4.1.9
affected: mitigation “WECON has verified these vulnerabilities but has not yet released an updated version. CISA is working with WECON and will update this advisory once an updated version is released.”

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

1.25% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	5.3	CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

WECON PI Studio HMI
WECON PI Studio

Classification

Weakness

CWE-611 Improper Restriction of XML External Entity Reference

References

ics-cert.us-cert.gov /advisories/ICSA-18-277-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2018-17889
NVD CVE-2018-17889

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