A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or InTouch Machine Edition 2017…

published 2018-04-18 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20448

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 8.6%; EPSS 8.6% chance of exploitation in 30 days, percentile 95%
public exploits: 0; none known

A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or InTouch Machine Edition 2017 v8.1 and prior versions during a tag, alarm, or event related action such as read and write, which 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-18-107-01 updated 2018-04-17 cvss 9.8

Schneider Electric InduSoft Web Studio and InTouch Machine Edition

Schneider Electric Software, LLC InduSoft Web Studio <= 8.1 Schneider Electric Software, LLC InTouch Machine Edition 2017 <= 8.1
affected: vendor fix, mitigation “Users using InTouch Machine Edition 2017 v8.1 or prior versions are affected and should upgrade and apply InTouch Machine Edition 2017 v8.1 SP1 as soon as possible.”

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

8.63% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

ICS-CERT Schneider Electric InduSoft Web Studio and InTouch Machine Edition

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

securityfocus.com /bid/103949
vdb-entry, third-party-advisory
software.schneider-electric.com /pdf/security-bulletin/lfsec00000125/
third-party-advisory
tenable.com /security/research/tra-2018-07
third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-18-107-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2018-8840
NVD CVE-2018-8840

Fencer Intel 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